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лл¡£ »ùÓÚÏÂÃæµÄ¼òÊö£¬STO-3GÓ¦¸Ã¿ÉÒԵġ£ 3-21GÊDz»ÊǸüºÃ£¿how about 6-31G(d)? Common Basis Sets Brief Description of Standard Basis Sets • Many other sets are in use. Existing sets can be modified Basis Set Description STO-3G Minimal basis; qualitative results - large systems 3-21G Double ¦Æ; more accurate results on large systems 6-31G(d) Moderate set; Common use for medium systems 6-31G(d,p) Used where H is site of interest; More accurate 6-31+G(d) Used with anions, excited states, lone pairs, etc. 6-31+G(d,p) Used with anions, etc., where H is site of interest 6-311++G(d,p) Good for final, accurate energies, but expensive |
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