Günes B, Nergiz E, Ide S, Sahin E, Irisli S
Physics Department, Gazi Education Faculty, Gazi University, 06500 Besevler, Ankara, Turkey.
Acta Crystallogr C. 2001 Nov;57(Pt 11):1282-4. doi: 10.1107/s0108270101014159. Epub 2001 Nov 13.
The asymmetric unit of the title compound, [Pt(C(25)H(22)P(2))(C(27)H(26)P(2))]Br(2) or [Pt(dppm)(dppp)]Br(2), where dppm is bis(diphenylphosphino)methane and dppp is 1,3-bis(diphenylphosphino)propane, consists of a discrete Pt(dppm)(dppp) cation and two Br(-) anions at van der Waals distances. This is the first reported platinum(II) complex containing both dppm and dppp ligands. Noticeable features are that the coordination of platinum by the differing dppm and dppp ligands produces a distorted coordination geometry with differing ligand bite angles (and to a lesser extent bond distances), and that the strain induced by the formation of the four-membered dppm chelate ring has a marked effect upon the bond angles at the P atoms of this ligand.
标题化合物[Pt(C₂₅H₂₂P₂)(C₂₇H₂₆P₂)]Br₂或[Pt(dppm)(dppp)]Br₂（其中dppm为双（二苯基膦基）甲烷，dppp为1,3 - 双（二苯基膦基）丙烷）的不对称单元由一个离散的[Pt(dppm)(dppp)]²⁺阳离子和两个处于范德华距离的Br⁻阴离子组成。这是首次报道的同时含有dppm和dppp配体的铂（II）配合物。值得注意的特征是，不同的dppm和dppp配体与铂的配位产生了具有不同配体咬合角（以及在较小程度上不同键长）的扭曲配位几何结构，并且由四元dppm螯合环形成所诱导的应变对该配体P原子处的键角有显著影响。
