Analytical Potential Energy Function Calculation for Ground State Σ of Lacl

Science Direct Working Paper No S1574-0331(04)70819-X

8 Pages Posted: 23 May 2017 Last revised: 30 Dec 2017

See all articles by Lin-Hong Chen

Lin-Hong Chen

Tsinghua University - Center for Astrophysics

Ren-Cheng Shang

Tsinghua University - Center for Astrophysics

Date Written: January 2002

Abstract

The equilibrium geometry, harmonic frequency and dissociation energy of LaCl have been calculated on B3LYP,MP2,QCISD(T) levels with the energy-consistent relativistic effective core potentials approximation. The possible electronic state and reasonable dissociation limit for the ground state of the molecule are determined based on Atomic and Molecular Reaction Statics (AMRS). The Potential energy curve scans for the ground state Σ have been carried out with B3LYP and QCISD(T) methods. Analytical Murrell-Sorbie (M-S) potential energy function and its Dunham expansion form around equilibrium position have also been derived with a nonlinear least-square fit. The calculated spectroscopic constants are in very good agreement with experimental results of vibrotational spectra. The analytical function we got is of much realistic importance due to its use in the calculation of transitional fine structure and the study of reaction dynamic process.

Keywords: Analitical Potential Function, LaCl

Suggested Citation

Chen, Lin-Hong and Shang, Ren-Cheng, Analytical Potential Energy Function Calculation for Ground State Σ of Lacl (January 2002). Chemistry Preprint Archive Vol. 2002, Issue 1, pp 267-274. Available at SSRN: https://ssrn.com/abstract=2969614

Lin-Hong Chen (Contact Author)

Tsinghua University - Center for Astrophysics ( email )

Beijing, 100084
China

Ren-Cheng Shang

Tsinghua University - Center for Astrophysics

Beijing, 100084
China

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