Molecular Mechanics (MM3) Calculations on Oxygen-Containing Phosphorus (Coordination IV) Compounds.
J Org Chem
; 64(15): 5350-5360, 1999 Jul 23.
Article
in En
| MEDLINE
| ID: mdl-11674592
ABSTRACT
An MM3 force field has been developed for small oxygen-containing phosphorus (coordination IV) compounds. Experimental electron and neutron diffraction, X-ray, and infrared spectral data were utilized in parametrization when available. Results from previous ab initio calculations at both the restricted Hartree-Fock (RHF) and second-order Møller-Plesset (MP2) levels of theory with the standard 6-31G basis set supplemented missing structural data, rotational profiles, and vibrational frequencies. Negative hyperconjugation (the anomeric effect) affects the structures and energies of the molecules under study which contain one or more sp(3)-hybridized oxygen atoms. Natural bond order (NBO) analysis was helpful in identifying the key orbital interactions involved in this effect.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
J Org Chem
Year:
1999
Document type:
Article