31P and 195Pt NMR characteristics of new binuclear complexes of [Pt2X4](PR3)2] cis/trans isomers and of mononuclear analogs
作者:Ibrahim M. Al-Najjar
DOI:10.1016/s0020-1693(00)84701-5
日期:1987.4
for complexes of binuclear platinum(II) of the type [Pt2(μ-X)2(X)2(PR3)2]. These were identified as intermediate from the reaction of the [PtX2COD)] complex with different tertiary phosphines (where X may be Cl or I and PR3 may be PBz3, PCy3, PCyPh2, PCy2Ph or PPh2C6F5). In addition, cis and trans-[PtX2(PR3)2] were produced in the final step, and their 31P and 195Pt are also described (X = Cl or I;
摘要首次报道了[Pt2(μ-X)2(X)2(PR3)2]型双核铂(II)配合物的31P和195Pt化学位移。从[PtX2COD)]配合物与不同的叔膦(其中X可以是Cl或I,PR3可以是PBz3,PCy3,PCyPh2,PCy2Ph或PPh2C6F5)的反应中鉴定出这些为中间体。此外,在最终步骤中还生成了顺式和反式[PtX2(PR3)2],并描述了它们的31P和195Pt(X = Cl或I; PR3 = PBz3,PCy3,PPhCy2,PPh2Cy,PPh2iPr,PPh2C6F5, PPh3,P(间甲苯基)3,P(对甲苯基)3,PBu3,PPhMe2,PPh2Me,(bis-1,2-Ph2P)-C6H4,Ph2PCH2PPh2或Ph2PCH2CH2PPh2)。研究表明,铂195的化学位移对复杂几何形状的性质相对敏感。非对称(不对称)顺式异构体的吸收频率(高场)比对称(对称)异构体低。)的