DIE CHEMISCHE VERSCHIEBUNG DES ZWEIFACHKOORDINIERTEN PHOSPHORS, I¹

Abstract

δ ³¹P (and J _PP, where occurring) of two-coordinate phosphorus compounds are compiled and arranged according to the atoms neighbouring the phosphorus. Low field shifts are clearly associated with a phosphenium type, high field shifts with a phosphide type phosphorus. The influence of the two substituents is roughly additive. With decreasing ability of the “doubly bonded” substituent to delocalize electrons from the phosphorus δ ³¹P shifts to higher field; parallels to δ ¹³C and δ ⁷⁷Se are shown.

¹ J _PP correlates well with the supposed bond order between the two-coordinate phosphorus and the two-, three- and four-coordinate phosphorus connected to it.

Characteristic ranges of δ ³¹P and ¹ J _PP can be associated with the different types of twocoordinate phosphorus compounds.