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Optimization of parameters for semiempirical methods IV: extension of MNDO,AM1, and PM3 to more main group elements
Authors:Email author" target="_blank">James?J?P?StewartEmail author
Institution:(1) Stewart Computational Chemistry, 15210 Paddington Circle, Colorado Springs, CO 80921, USA
Abstract:The NDDO semiempirical methods MNDO, AM1, and PM3 have been extended to all the remaining non-radioactive elements of the main group, excluding the noble gases. Most of the new elements are of Groups I and II. 44 sets of parameters are presented for the following methods and elements. MNDO: Na, Mg, K, Ca, Ga, As, Se, Rb, Sr, In, Sb, Te, Cs, Ba, Tl, and Bi; AM1: Li, Be, Na, Mg, K, Ca, Ga, As, Se, Rb, Sr, In, Sn, Sb, Te, Cs, Ba, Tl, Pb, and Bi; PM3: B, Na, K, Ca, Rb, Sr, Cs, and Ba. Average errors are presented for heats of formation, molecular geometries, etc.
Keywords:Semiempirical methods  MNDO  AM1  PM3  Parameter optimization
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