The shielding tensor. Part I: Understanding its symmetry properties

摘要: The shielding tensor and the chemical shift are not necessarily symmetric, in general they have both symmetric antisymmetric parts. part (not to be confused with anisotropy of part) does give rise an observable shift, even solid phase, but it cause relaxation. can considered its corresponding axial vector form, this allows effect symmetry at a nuclear site deduced easily. Instead considering complete point group nucleus, is easier consider only certain key elements symmetry; leads four simple rules that determine zero nonzero components tensor.