β Scribed by Timothy A. WIildman
No coin nor oath required. For personal study only.
The hmrtatrons of the concept of a drhedral angle III conformational analysrs are drscussed The madequacy of the descrrptron of molecules as canomcal forms 1s emphasued by ensemble averagmg of quantum mechanical expectation values of the drhedral angle for a srmple. two-fold potentral The unportance of the quantum mechamcal approach is ilhrstrated by examples
π SIMILAR VOLUMES
Molecular orbital calculations of the extended Hiickel type have been used to study the conformations of glycyl and alanyl residues in ground and excited states. The ground-state surfaces show features similar to those obtained with the standard calculational methods in which the total energy is par
The recently reported Random Incremental Pulse Search (RIPS) technique has been used to probe the conformational energy surface of cyclononane. The stochastic method permits searching of the potential energy surface for all minimum-energy conformations. The search located all previously reported str
The YPCH2CH3 internal rotation in the HC(=X)YCH2CH3 ( X , Y = 0 or S) series of molecules was studied by the ab initio SCF-MO method using 3-21G and 3-21G + d ( r = 0.65s) basis sets. Energies and structures of several conformations of these molecules, determined by gradient geometry refinement, are