Title
Ab initio and molecular mechanics (MM2 and MM3) calculations of positively charged conjugated nitrogen-containing compounds
Abstract
Ab initio calculations have been carried out on s-trans-N-vinylmethyleneammonium, pyridinium, and related compounds to obtain rotational barriers, structures, and vibrational frequencies. The restricted Hartree-Fock (RHF) level of theory with 6-31G** basis set was used for these calculations. In addition, the MM2(91) and MM3(94) force fields have been parameterized to calculate these positively charged nitrogen-containing compounds. A bond order term was incorporated in the force field to reproduce accurately the rotational barriers of s-trans-N-vinylmethyleneammonium and related compounds. Molecular mechanics geometries and vibrational frequencies compare well with those calculated by ab initio methods. (C) 1996 by John Wiley & Sons, Inc.
Year
DOI
Venue
1996
10.1002/(SICI)1096-987X(199609)17:12<1395::AID-JCC2>3.0.CO;2-F
JOURNAL OF COMPUTATIONAL CHEMISTRY
Keywords
Field
DocType
molecular mechanics,nitrogen
Molecular mechanics,Nitrogen,Computational chemistry,Chemistry,Ab initio,Conjugated system
Journal
Volume
Issue
ISSN
17
12
0192-8651
Citations 
PageRank 
References 
0
0.34
1
Authors
3
Name
Order
Citations
PageRank
Georgia McGaughey1929.06
Eugene L. Stewart251.92
J. Phillip Bowen31513.55