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Acta Chimica Sinica ›› 2001, Vol. 59 ›› Issue (6): 968-971. Previous Articles Next Articles
Original Articles
禚淑苹;韦吉崇;陈德展;居冠之
发布日期:
Zhuo Shuping;Wei Jichong;Chen Dezhan;Ju Guanzhi
Published:
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The intrapair and interpair correlation energies of HF molecule and Ne atom are calculated at MP2/6-311 + + G(d) level by using ROHF-OPT1 method of MELD program. The pair correlation energies of these two isoelectronics systems are analyzed and compared. The generality and difference of intrapair and interpair correlation energies between these two isoelectronic system are investigated. One of the results of the comparison shows that the chemical bond of a molecule is one of the important factors to influence the electron correlation energy of the system. Our calculated results for the contribution of triple and quaduple excitations of these two systems indicate that the contribution of the higher-excitation termsis not negligible for the accurate calculations in quantum chemistry.
Key words: HYDROGEN FLUORIDE, NEON, QUANTUM CHEMISTRY
CLC Number:
O641
Zhuo Shuping;Wei Jichong;Chen Dezhan;Ju Guanzhi. Comparative study on the intrapair and interpair correlation energies of two isoelectronic systems HF and Ne[J]. Acta Chimica Sinica, 2001, 59(6): 968-971.
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