Determination of the conformation and stereoisomerism of diphosphines using (P,C) spin–spin coupling constants
Abstract
Values of |NPC|=|1JPC+2JPPC| are presented for a number of tetra-alkyldiphosphines, and it is shown that this parameter is characteristic of the orientation of the alkyl group concerned relative to the phosphorus lone pairs; this fact leads to assignments of conformation and stereoisomeric configuration.