𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Molecular mechanics parameterization: Bond lengths and angles for nitrogen and phosphorus containing compounds

✍ Scribed by Joseph M. Leonard; William P. Ashman


Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
556 KB
Volume
11
Category
Article
ISSN
0192-8651

No coin nor oath required. For personal study only.

✦ Synopsis


Molecular mechanics provides an excellent means of generating reasonable chemical structures in a short amount of time. Using a classical representation, a molecule can be partitioned into a collection of n-fold atomic interactions, each with an associated force constant. In order for a calculation to proceed, all of the required force constants must be known. This article presents a method of rapidly determining the values for missing parameters using appropriately scaled quantum chemical techniques.


πŸ“œ SIMILAR VOLUMES


Ab initio and molecular mechanics (MM2 a
✍ McGaughey, Georgia B.; Stewart, Eugene L.; Bowen, J. Phillip πŸ“‚ Article πŸ“… 1996 πŸ› John Wiley and Sons 🌐 English βš– 726 KB

Ab initio calculations have been carried out on s-trans-Nvinylmethyleneammonium, 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 ad

Ab initio and molecular mechanics (MM2 a
✍ Georgia B. McGaughey; Eugene L. Stewart; J. Phillip Bowen πŸ“‚ Article πŸ“… 1995 πŸ› John Wiley and Sons 🌐 English βš– 711 KB

## Abstract High‐level __ab initio__ calculations have been performed on __N__‐methyl‐__N__‐methyleneammonium and related compounds to obtain accurate rotational barriers, structures, and vibrational frequencies. The 6‐31G\*\* basis set has been utilized at the Hartree‐Fock level of theory for thes

New out-of-plane angle and bond angle in
✍ Lee, Sang-Ho; Palmo, Kim; Krimm, Samuel πŸ“‚ Article πŸ“… 1999 πŸ› John Wiley and Sons 🌐 English βš– 315 KB πŸ‘ 2 views

With currently used definitions of out-of-plane angle and bond angle internal coordinates, Cartesian derivatives have singularities, at "r2 in the former case and in the latter. If either of these occur during molecular mechanics or dynamics simulations, the forces are not well defined. To avoid suc