The synthesis of a range of diphosphines R2PCH2CH2PR2 from Cl2PCH2CH2PCl2 is described. The properties of a series of complexes [ReCl(N2)(R2PCH2CH2PR2)2] derived from them are discussed. The relationship between the values of E½ox and ν(N2) for the complexes suggests that electron-withdrawing substituents on the diphosphine upset the usual balance of σ and π effects in rhenium–dinitrogen bonding.
描述了从Cl 2 PCH 2 CH 2 PCl 2合成一定范围的
二膦R 2 PCH 2 CH 2 PR 2。讨论了从它们衍生的一系列配合物[ReCl(N 2)(R 2 PCH 2 CH 2 PR 2)2 ]的性质。的值之间的关系Ë ½牛和ν(N 2),用于所述配合物表明在
二膦即吸电子取代基打乱σ和
铼二氮键合π作用的通常的平衡。