Unification of the quantum and classical theories of methyl NMR

The existing low and high temperature theories of methyl NMR are not linked because two conditions imposed on state functions in the low temperature t heory are not compatible with the classical rotations on which the high tem perature theory is based. The conditions do not occur in a geometrical theo ry of quantum phenomena in which particles and waves have separate roles. W hen applied to methyl dynamics, this theory covers the whole temperature ra nge. (C) 1999 Elsevier Science B.V. All rights reserved.