Phosphorus–phosphorus nuclear spin coupling in tetraorganobiphosphines and some of their derivatives
作者:H. Christina E. McFarlane、William McFarlane、John A. Nash
DOI:10.1039/dt9800000240
日期:——
31P–31P and 31P–H spin-coupling constants in tetraorganobiphosphines RR′PPRR′ with Me, Ph, and/or But as substituents, and in their sulphides and selenides RR′P(X)P(X)RR′(X = S or Se), have been determined by 1H-31P} heteronuclear double resonance. Large variations in 1J(31P-31P) arise as a result of changes in the phosphorus hybridization and/or effective nuclear charge, and smaller variations as a result
的体征和幅度31 P -31 P和31在tetraorganobiphosphines RR'PPRR“与我中,Ph p-h自旋偶合常数,和/或卜吨作为取代基,并且在它们的硫化物和硒化物RR'P(X) P(X)RR'(X = S或Se),由1 H- 31 P}异核双共振确定。在大的变化1 Ĵ(31 P- 31 P)出现作为磷杂交和/或有效的核电荷的变化,和更小的变化如在在旋转异构体平衡位置变化的结果的结果笨拙的biphosphines的构象异构体。