weight of evidence suggests negligible contribution from this canonical form. Comparison is drawn to the structurally characterised O=P(C6H5Me-2)3 (8) in which the lone pair is sequestered. The coordination of 2–5 to rhodium(I), palladium(II) and platinum(II) is described, affording rare examples of aroylphosphane complexes of the platinum-group metals.
通过各自的芳酰
氯和HPPh2的无碱缩合,已经以良好的收率制备了一系列芳酰膦。除了环烷 m--C(O)-
C6H4(C(O)PMe)}2 (1), RC(O)PPh2} (R = 3-Me 2, 3-
CH2Cl 3, 4-CO2Me 4, 4-CN 5) 和双(芳酰基膦) 2,6-C(O)PPh2}2 (6) 和
C6H3N2,6-C(O)PPh2}2 (7 )符合“
磷酰胺”特征的表现;然而,大量证据表明这种规范形式的贡献可以忽略不计。与结构特征的 O=P(C6H5Me-2)3 (8) 进行比较,其中孤对被隔离。描述了 2-5 与
铑 (I)、
钯 (II) 和
铂 (II) 的配位,提供了
铂族
金属的芳酰基膦配合物的罕见例子。