Potential energy curves of diatomic molecules in hindi

Potential energy curves of diatomic molecules in hindi. The easiest way to do this is to write our energy level diagrams, and on each side, where we have the original atomic orbitals, put the number of electrons in each atom. The student incorrectly sketches the potential energy curve for two. The first of these tools, a computer program called DUNCON, generates spectroscopic data. , the Schroedinger wave equation (SWE) for a diatomic molecule. A new and flexible function that is a valid representation of the potential energy of diatomic molecules within the entire range of accessible internuclear separations is proposed. Let’s start with the molecule He. The atoms are in equilibrium if `r = OA` B. Using the harmonic oscillator model, we can represent a diatomic molecule as two The potential energy expression U=e−a(r−r12)−C′ e−a'(r−re) previously applied to diatomic molecules containing only first row elements is now applied to other types. See, for example, Fig. The constants a1, a2 and a3 are obtained from the harmonic, cubic and quartic force constants. This paper describes the RKR method-which is not found in standard textbooks- and how to use it in conjunction with a microcomputer program to have students Question: 29. Transfer. 74 Å, and the potential energy convergence position calculated by the B3P86 method is much higher than the dissociation energy. The mathematical behavior of these functions for the short- and long-range regions diatomic molecules. The force is repulsive only if `r` lies between A and B C. Furthermore, six kinds of common potential energy curves containing three main potential curves i. For any arbitrary, but constant, value of R the energy of the molecule is calculated. The two potential energy functions give accurate representations of the available numerical potential energy curves with average deviations over the 30 molecules of approximately 0. Introduction Curves of the potential energy versus internuclear distance forro a con- venient way of displaying the energy levels of diatomic molecules. 122067 Corpus ID: 253551245; Theoretical study on the vibrational spectra and potential energy curves for SiC (X3Π) and SiS (X1Σ+) molecules. 16 A which corresponds to tungsten. 0 X 10' em-I. , He 2, HeNe, or ArH). Among these, empirical functions, some of which were collected by Lippincott [8], are frequently simple and easy to use. The following procedure should be followed when trying to calculate the number of vibrational modes: Determine if the molecule is linear or nonlinear (i. A. J. This yields the potential energy curves E(R) for the different electronic states of the molecule. 2 12. Jun 15, 1980 · A new generalized expansion for the potential energy curves of diatomic molecules is proposed. Oct 1, 1988 · Potential energy curves of a homonuclear diatomic molecule X; (with d^^l. 3, some typically shaped potential curves for a diatomic system usually thought of as unbound (e. 0261 and 0. The smallest term considered by [JOH 85] consists of the "leftovers" and is collectively called the Lamb-shift correction (which we call t:,. Molecules containing Jul 15, 2014 · In recent work, Jiang and Wilson have used MR-ccCA to calculate potential energy curves for the ground states of first-row main group diatomic molecules, C 2, N 2, and O 2, and their excited states and demonstrated the ability of MR-ccCA to produce dissociation energies with a MAD of 1. If linear, use Equation 12. We test the approach to find spectroscopic characteristics for the ground X 2 Σ + electronic state of MgF molecule based on the experimental energies of ro-vibrational transitions. These will be the electrons that we use to fill our molecular orbitals. 1. 0208, 1. C = N > C − P > C − N. The lattice parameter is (IQ = 3. 4515, 0. Notice that the lowest potential energy curve has only a very small minimum at large ΔR. Jul 8, 2008 · A new method on constructing analytical potential energy functions is presented, and then a relatively universal analytical potential energy function for precisely calculating the spectra of diatomic molecules and ions is derived. Using a traditional technique/methodology, the vibrational energy and the un-normalized The calculation of potential energy curves of diatomic molecules: the RKR method. Mar 15, 2024 · The corresponding potential energy curves of the doublet and quartet electronic states for the considered five molecules are given in Figs. At first, a general case with this energy dependent potential is investigated in order to test the efficiency Nov 15, 1986 · A computational scheme for molecules is presented for the evaluation of total enregy properties such as potential energy curves and vibrational frequencies. Feb 12, 1992 · DOI: 10. 3938/jkps. EQ + tiEFS). asked Apr 19, 2019 in Physics by ManishaBharti ( 65. RANTALA1, Bo WASTBERG and Ame ROSEN Department of Physics, Chalmers University of Technology and University of Goteborg, S-412 96 Goteborg, Sweden Received 3 June 1986 A computational scheme for molecules is presented for the Nov 5, 2021 · The H 2 potential energy curve is illustrated in Fig. The Nov 18, 2021 · The potential energy curve of the cesium dimer for \(3^{3} Jia, C. 2 + has three electrons. It is based on matching the perturbation theory at small internuclear distances R and multipole expansion at large distances, modified by exponentially small terms for homonuclear case, with the addition of Apr 1, 2016 · Figure 3. Journal of Chemical Education. Printed in Great Britain THE CALCULATION OF POTENTIAL ENERGY CURVES OF DIATOMIC MOLECULES: APPLICATION TO HALOGEN MOLECULES J. For most of them the same value of a (6. }, author={Qunchao Fan and Hongrui Tian and Zhixiang Fan and Hui Mar 11, 2022 · The average absolute deviation from the dissociation energy obtained for the diatomic molecules are: 0. Later on we will then extend our model to include Jun 1, 2018 · In the present paper we consider three simplest diatomic molecular systems, two are homonuclear H 2 + and H 2 and another one is heteronuclear, HeH, and construct simplest the analytical approximations of the potential curves. You might need: Periodic table. L {llESELF + tiE UEHL + AEHO. Vol. The force is attractive if `r` lies between A and B D. Soc. These expressions have been used in calculating the true potential curve of the B3II0u+ state of 79Br81Br molecule and the results show maximum in the potential energy. The potential energy curve provides a broad insight into the structure of a molecular system. Radiat. The possible appearance of the hump and the double-minimum q the potential curve has also been investigated. The student also finds that the I-I bond The potential energy U between two atoms in a diatomic molecules as a function of the distance x between atoms has been shown in the figure. May 13, 2024 · Figure 5. A simplified method for evaluating f and g involved in the calculation of r max and r min for the electronic states of diatomic molecules, whose energy terms cannot be represented by a quadratic in v+ 1 / 2, is discussed. 2022. The zero point of potential energy is the energy at equilibrium position of ground state. A general relation between potential energy and internuclear distance is proposed which is applicable to the ground states of diatomic and polyatomic molecules. If a diatomic molecule consists of two atoms of the same element, such as hydrogen ( H2) or oxygen ( O2 ), then it is said to be homonuclear. Enter the email address you signed up with and we'll email you a reset link. Let’s +start with the molecule He. In particular, we use a multi-objective GA fitting approach based on a single point crossover. @article{Fan2022TheoreticalSO, title={Theoretical study on the vibrational spectra and potential energy curves for SiC (X3$\Pi$) and SiS (X1$\Sigma$+) molecules. For atoms with a positive electron affinity, the atomic ion pair Oct 22, 1999 · This implies that the curvature (and hence the force constant) in reduced variables is approximately constant when an electron is added to or removed from a diatomic species. Terreni, F. May 1, 1971 · J. Tommasini; Representation of potential energy curves for diatomic molecules. Suggestion: most of the experimentally derived values require careful Apr 21, 2022 · Following the first principles, the elements of the analytic theory of potential curves for diatomic molecules (diatomics) are presented. Which of the following statements is false? AB OCD -100- -200 Energy / [kj/mol) -300 -400 -500 0 50 100 150 200 250 300 Internuclear Distance / [pm] 350 400 A CD has a stronger bond because it has a lower minimum energy than AB B. potential energy curves for O2 from P. Some of the reasons for this are experimental: the line intensities are usually measured with much higher uncertainty. Here x = 2β ( r — re )/ re. Potential energy curves of (a) the KRb molecule in the X 1 Σ + electronic state, (b) the KRb molecule in the a 3 Σ + electronic state, (c) the RbSr molecule in the X 2 Σ + electronic state, and (d) the CaSr molecule in the X 1 Σ + electronic state computed using different basis sets and the CCSD(T) method. The estimated dissociation energies are 4. The method consists of dividing the observed vibrational term system into segments, each segment consisting of two Diatomic molecules (from Greek di- 'two') are molecules composed of only two atoms, of the same or different chemical elements. Oct 13, 2023 · A shifted Morse potential model is modified to fit the study of the vibrational energies of some molecules. The higher vibrational energy levels are not known for most molecules, so that it is not possible to determine the potential uniquely for large internuclear separations from the existing experimental data. -S. (a) Ab initio potential curves for H 2 [7] and H 2 + [6]. 1 12. An analytic potential for stable states of diatomic molecules is proposed V=–De(1 +a1r+a2r2+a3r3)e–a1r. Complexity to describe the bond-breaking of TM. State the major factors that determine the distance between two bonded atoms. 06 kcal mol −1 from experiment [35]. Reference Data 1, 423-543, 1972. In Jun 21, 2019 · In this work, a review of six functional forms used to represent potential energy curves (PECs) is presented. (b) Ab initio potential energy values plotted in terms of reduced An analytic potential for stable states of diatomic molecules is proposed V=–D e (1 +a 1 r+a 2 r 2 +a 3 r 3)e –a 1 r. Normalize the molecular orbital ψ = ψ A + λ ψ B + λ ' ψ B ' in terms of the parameters λ and λ '. Microsoft Teams. CD has a weaker Jul 18, 2023 · According to the Lippincott criterion, 62 the AAD of the potential model must be less than 1 \({\%}\) of the dissociation energy in order to fit the RKR potential curve. Estimated potential curves for the Xe 2 + ion and for the lower excited states of the Xe 2 molecule are given. The constants for the first of these potentials are easy to evaluate and are given for 25 common diatomic molecules. 0 × 10 8 cm —1 ) can be used satisfactorily, the r 12 values then being additive and depending only on the row of the The analytical expression for this potential curve is illustrated numerically. Our approach relies on a function free fitting approach employing a point-wise description of the diatomic potential. The five parameter Hulburt—Hirschfelder function and Rao and Reddy's modified potential function have been used. Martínez. 1 in [78] and for LiH Fig. Which of the following arranges the bonds in order of decreasing bond length? Choose 1 answer: C = N > C − P > C − N. The plot below shows the potential energy curves of two diatomic molecules AB and CD. Sep 5, 2003 · As a first step in analyzing the effect of an avoided crossing on the spectrum of a diatomic molecule, a formalism is presented for dealing with the vibrational problem. 8 (C' - C), calculated using a =4. Jun 15, 1980 · Representation of potential energy curves for diatomic molecules S. Otherwise, if a diatomic molecule consists of two different atoms, such as The potential energy of this diatomic molecule is modeled by the Lennard-Jones potential shown below, where r represents the distance between the two atoms and Eo is the ground state (minimum energy) of the molecule. and the appropriate overlap integral S, where ψ B and ψ B ' are mutually orthogonal orbitals. Applications of this Jun 1, 1970 · The dissociation energies of the diatomic molecules have been computed by fitting an empirical potential function to the experimental potential energy curves for the electronic ground states of the molecules. 1. The first two go Sep 12, 2021 · While the potential energy function, \(V_e (R)\), for a diatomic molecule is a 1-D curve (Figure \(\PageIndex{1}\)), molecules with more than two atoms will have multi-dimensional potential energy surfaces with 3N-6 (or 3N-5 for linear molecule) dimensions for the number of internal degrees of freedom. The calculations are performed within the local density approximation utilizing the LCAO MO scheme with numerical basis functions, and multipole expansion of the molecular charge density is Feb 9, 2019 · For diatomic molecules this means that the internuclear distance is fixed and we neglect their vibration. (London) · OSTI ID: 4805579 An analytic potential for stable states of diatomic molecules is proposed V=–D e (1 +a 1 r+a 2 r 2 +a 3 r 3)e –a 1 r. An energy-consistent method is proposed for calculating accurate potential energy curves of diatomic states. Dec 1, 1993 · On the basis of the deformable body mode1 and the Morse potential approximation a six-parametric spectral expansion of the rovibrational energy of diatomic molecules, competitive to the standard Jun 26, 2019 · The point of maximum and minimum attraction in the curve between potential energy (U) and distance (r) of a diatomic molecules are respectively. Identify the correct stateement. Oct 13, 2023 · One of the main goals of measurements of spectra of diatomic van der Waals molecules is to determine the molecular potentials of electronic states involved in the studied transitions. The potential energy curves of some diatomic molecules are reproduced and the diagrams of ir-spectra for one- and two-quantum vibrational transitions in a few diatomic molecules are supplied with the calculated values of Einstein coefficients for spontaneous emission from vibrationally excited states. 2 +. e. Physics. The starting point is the Rydberg potential, followed by functions by Hulburt–Hirschfelder, Murrell–Sorbie, Thakkar, Hua and finalizing with the potential for diatomic systems by Aguado and Paniagua. Here’s the best way to solve it. Practice your skills with interactive quizzes. Camacho and Miguel Paniagua}, journal={Journal of Molecular Structure-theochem}, year={1992 Abstract : This thesis presents the tools necessary to transform spectral data from diatomic molecules into potential energy curves which are most consistent with the experimental data and the quantum mechanical model (i. 2. Draw out molecule using VSEPR). 2. g. 1016/0166-1280(92)80059-U Corpus ID: 95984485; A numerical procedure to obtain accurate potential energy curves for diatomic molecules @article{Aguado1992ANP, title={A numerical procedure to obtain accurate potential energy curves for diatomic molecules}, author={Alfredo Aguado and J. 61 ± Jan 1, 1970 · Abstract. In the study of Nov 15, 1986 · Chemical Physics 109 (1986) 261-268 North-Holland, Amsterdam 261 POTENTIAL ENERGY CURVES FOR DIATOMIC MOLECULES CALCULATED WITH NUMERICAL BASIS FUNCTIONS Tapio T. The constants a 1, a 2 and a 3 are obtained from the harmonic, cubic and quartic force constants. 171 in [27]. For the low Z values (1 and 3) considered here, there are six significant contributions (see Fig. , Weiss ). We have determined the RKR potential energy curves for N2 and CO molecules using classical turning points rinner and router with the help of spectroscopic constants [41]. Truncations of this series have the form of finite power series in R−1. 5,22, For instance, it has enabled the proper spectral assignment of highly excited vibrational states using the experimental s-wave scattering Nov 13, 2022 · Sketch out a potential energy curve for a typical diatomic molecule, and show how it illustrates the bond energy and bond length. Castaño, J. The program Feb 19, 2024 · The hyperbolical-type potentials, however, are not frequently used to describe molecular interactions because it is not suitable for diatomic molecules (DMs) potential energy curves . COXON Department of Chemistry, Queen Mary College, University of London, Mile End Road, London El 4NS, England (Received 7 July 1970) Abstract-Methods for computing the vibrational Jan 1, 2017 · Mass spectra resulting from superthermal collisions between polyatomic ions and atomic or diatomic targets have been acquired as a function of the collision energy over a range of 10–6000 eV for For diatomic molecules, we are able to obtain a much broader range of information from experimental data than is possible for larger molecules. -462. 0. Krupenie, The spectrum of molecular oxygen, J. Their rovibrational energy eigenvalues are calculated by applying the quantum supersymmetry (SUSY-QM) formalism related to this kind of potentials associated to the Pekeris approximation of the centrifugal term. 06% of D e, or 1 meV (∼ 8 cm−1). The quantities wn are obtained simply as perturbation May 15, 1970 · The excited and ionized states of the heavier rare‐gas molecules are discussed, existing evidence on the dissociation energies of the ions are reviewed, and estimates of these dissociation energies are made. Explain why the potential energy changes (either increases or decreases) as the two molecules approach. For these distances, it may be feasible to compute the potentials from the first- and second-order Potential energy curves are also important for the interpretation of molecular spectra and chemiluminescent atom recombination processes (see, e. The possible appearance of the hump and the double-minimum in the potential curve has also Apr 21, 2022 · Following the first principles, the elements of the analytic theory of potential curves for diatomic molecules (diatomics) are presented. For the ground states, there are sufficient Mar 18, 2021 · We present a new approach which employs a deep neural network to obtain parameters of analytical representation of potential energy curve of diatomic molecule. If nonlinear, use Equation 12. Calculate how many atoms are in your molecule. . 8925% respectively, suggesting that the MHTP is an Nov 14, 1999 · A physically well behaved analytical potential of a diatomic system is constructed based on perturbation theory and a potential correction to the Murrell-Sorbie potential. The relativistic effects were small and on the order to 0. For some cases it is 15 kcal mol−1. It is based on matching the perturbation theory at small The potential energy expression U=e −a(r−r 12) −C ′ e −a'(r−r e) previously applied to diatomic molecules containing only first row elements is now applied to other types. 13 nm, and r = 0. Juan, E. saa. This function is shown to be a member of a family of functions that Dec 2, 2019 · Learn how to interpret potential energy curves of diatomic molecules with Khan Academy's worked example video. In addition to equilibrium structures, we can often determine an accurate bond dissociation energy, an accurate potential curve for the whole potential well, and sometimes also the Born-Oppenheimer It is exactly shown that the generalized Woods-Saxon potential and the well-known Rosen-Morse potential are the same empirical potential-energy function for diatomic molecules. One way Feb 1, 2012 · The existing routines for construction of experimental potential energy curves for diatomic molecules are based mainly on transition frequencies while the line intensities are seldom used. Phys. l A) for several values of iiss an^ ^or trle geometry of approach shown in the inset. The potential well pictured on the previous page is for a particular electronic state (a bound state), which could well be the electronic ground state (see O2, just above, for a more complex system of potentials). Non-adiabatic, mass polarization, relativistic, QED effects are out of the scope of this paper. Universal Scaling of the Inner Branch of Fifty RKR Potential Energy Curves. Now using a dotted line draw a similar curve - on the same set of axes. 65. Syectroac. et al. The atoms are in equilibrium if `r =OB` Keywords: OH radical, ab initio calculation, Potential energy curve, Multi-reference configuration interac-tion, Excited electronic state, Spectroscopic constant, Franck-Condon factor DOI: 10. Thus, a better model is The purpose of this paper is to give a simple expression for the potential-energy function for diatomic molecules for which one can solve exactly the Schrödinger equation for both discrete and continuous energy parameters,E. Aug 23, 2022 · The energy-dependent Morse potential is used to study diatomic molecules. steady state, metastable state and repulsive state are obtained Aug 25, 2022 · Potential energy curves (PECs) for the ground electronic states of HI, HBr and KLi molecules have been modeled by the VIHH analytical potential, and it suggests that the VIHH potential is in good Apr 24, 1997 · Morse potential energy curves for the lowest six states of the rare gas positive ion dimers have been calculated on the basis of experimental data. Draw a graph showing the change in potential energy as two molecules of fluorine get closer to each other. Alternative formulae for rotational constants and ro-vibrational energies are suggested. Jun 1, 2004 · Potential energy curves for diatomic molecules are usually obtained in one of the four forms: (1) a table of points from ab initio or RKR calculations [1], [2], [3]; (2) Padé approximants [4]; (3) a (truncated) power series [5], [6], [7]; (4) one empirical function. Mar 1, 1989 · The potential energy functions of 200 diatomic systems, with dissociation energies D e ranging from few eV to hundreds of eV, are well described by a new three-parameter potential energy function. Google Classroom. When this minimum is important for the problem at hand, such a potential energy curve Dec 1, 2016 · It has long been known that atomic ion pairs were important for the description of the potential energy curves for many molecules [76], including even the lowest potential curves for the alkali metal hydrides [77]. 0 × 108 cm—1) can be used satisfactorily, the r12 values then being additive and depending only on the row of the periodic table in which the atoms occur. The potential is shown to be superior to the Hulburt–Hirschfelder potential when tested on a least-squares basis against the spectroscopic RKR potential. Apr 24, 2019 · In conclusion, we present a novel technique for fitting the potential energy curves of diatomic molecules. . It is of particular use in cases where data are available for a large number of vibrational levels Alternative simplified expressions have been deduced for f and g involved in the calculation of the true potential energy curves of such electronic states of diatomic molecules whose vibrational terms cannot be adequately represented by a quadratic in v + ½. It is given by where λ (p) = sgn(p) [1 − (Re/R)p], and contains both the Dunham and the Simons− The dissociation energy is (empirically) about 0. Differentiate between the two potential energy curves for electronic states of a diatomic. Chem. I. F. The valence shell of X and the substrate d band are both half filled, (a) Equipotential energy curves for E^(X^) = 5 eV. 8k points) DOI: 10. A mathematically well‐defined procedure is given for going from potential curves exhibiting an avoided crossing (such as would be obtained by solving exactly the eigenvalue problem associated with the complete electronic A model for the vibrational potential‐energy functions of diatomic molecules, previously applied to homonuclear molecules only, is extended to 54 heteronuclear diatomic molecules in 93 different electronic states. The Journal of Physical Chemistry A 1999 , 103 (46) , 9313-9322. Researchers [14,15,16,17,18] in recent times have used the improved hyperbolical-type potentials to fit the potential energy curves of DMs. The potential is shown to be superior to the Hulburt–Hirschfelder potential when tested on a least-squares basis against the Jun 5, 2019 · The potential energy U of diatomic molecules as a function of separation `r` is shown in figure. Figure 4 shows, to about the same scale as Fig. 11, pp. 1016/j. A method of calculating potential energy curves for diatomic molecules from experimental data is described which depends upon direct numerical integration of Klein's equations, and avoids the use of analytical representations of the energy levels. Oct 28, 1999 · An energy-consistent method is proposed for calculating accurate potential energy curves of diatomic states. Download : Download full-size image; Fig. The potential is shown to be superior to the Hulburt–Hirschfelder potential when tested on a least-squares basis against the The potential energy curves for the ground state of diatomic H2 and N2+ molecules are constructed techniques using the five-parameter H-H function. Published 1 February 1983. 2 shows the potential curves of some electronic state of the C 2 molecules [54], and the energy level of the C atom [55], the fine structure of the atomic levels is not shown. 2017 I. This is according to the involvement of the perpendicular orbitals to the molecular axis in the case of П and Δ symmetries. 3 kcal mol−1. 1% of the total energy. Pergamon Press 1971. Prominent diatomic spectra include the green color of the Swan system of C2 that can be seen in a Bunsen burner flame,(1) the emission of N in the aurora(2) 2. Letra = 0. This equation may be written in the form a method for obtaining the vibrational wave functions appropriate to the true potential energy curves of diatomic molecules Journal Article · Wed Aug 01 00:00:00 EDT 1962 · Proc. Intramolecular force and potential energy. Applications of this method to the electronic states X 1g+, C 1u, a 3g+, e 3u+ of H2 A perturbation theory is developed whereby the diatomic molecular potential energy W(R) as a function of the internuclear distance R is expressed, for R near Re, as a power series in the parameter λ = 1 − (Re / R), W(λ) = w0 + ∑ n = 1∞ (wn − wn−1)λn. Very high. Equivalence of the Wei potential model and Tietz potential model for diatomic molecules. The minimum in this curve defines the bond length of the diatomic molecule. 7025, 0. INTRODUCTION An accurate representation of the potential energy curves (PECs) of diatomic molecules as a function of Accuracy tests are carried out for a set of ground electronic states of 30 diatomic molecules. The equilibrium positions calculated by various methods are all around the internuclear distance r e = 0. The study of the electronic spectra of diatomics has a long history. molecules using the below graphs. INTRODUCTION MORSE'S equation' for the potential energy of a diatomic molecule as a function of the internuclear distance has been found very useful by band spectroscopists and others. values for the 60 transition metal (TM) diatomic molecules Mean absolute deviation (MAD) of 3. homonuclear diatomic molecules. The dipole moment curve is calculated at the same level of theory as the potential energy curve except the relativistic corrections were not included as the inclusion of a finite electric field within a relativistic Hamiltonian cannot be performed in ORCA 5. Comparison of the Valence State, Morse, and Rydberg Curves. and the atmospheric A-band absorption of oxygen first seen by Fraunhofer. 3451, 0. H. With only a few exceptions, the improved potentials lie above the Morse curves and the corrections for moderately large internuclear separations may amount to ten percent of the energy of dissociation. 2 of [JOH 85]): AE LAMB = . The analytical expression for this potential curve is illustrated numerically. (3) The spectra of TiO were seen in. 12 nm, 12 = 0. Explain how the heat released or absorbed in a chemical reaction can be related to the bond energies of the reactants and products. 14 nm. Aug 15, 2017 · The repulsive behavior between electrons-helium interactions is clearly identifiable in Ca 2+ He, Ca + He and CaHe potential energy curves, predominately in Σ + and much stronger than for П and Δ symmetries. The atoms are: The atoms are: View Solution Dec 1, 1995 · The spectroscopic constants for N2 and CO are taken from Herzberg [5] and the values are given in Table 1. Deviations in the calculated dissociation energy from the exp. He. While investigating the properties of other diatomic molecules, the student finds the diagram below, which shows the potential energy of two iodine atoms versus the distance between their nuclei. Label the position where the molecules are most stable. Quant. FS1-FS9 along with their static dipole moments (Figs Where potential energy functions of diatomic molecules are concerned, this procedure certainly appears to be a suitable tool when it is based on the RPC method of Jenč. ut cq js sl vm pp sz tb pl ub