Reaction of R3AsI2(R = Me or Et) with zinc metal powder to produce ZnI2(AsMe3)2 and [ZnI2(AsEt3)]2, the first tertiary arsine complexes of zinc(II)
作者:Stephen M. Godfrey、Charles A. McAuliffe、Robin G. Pritchard、Joanne M. Sheffield
DOI:10.1039/dt9960003309
日期:——
The reaction of Et3AsI2 with zinc metal powder produced the dimeric complex [ZnI2(AsEt3)]2, whereas that of Me3AsI2 gave equimolar quantities of ZnI2(AsMe3)2 and ZnI2, the latter being identified by X-ray powder diffraction. Both arsine complexes have been structurally characterised and as such represent the only examples for zinc(II). A structural change is thus seen on changing the R groups on the R3AsI2 compound. The complex ZnI2(AsMe3)2 represents the sole example of a bis(ligand) complex of zinc(II) containing a Group 15 donor atom. Both complexes contain the zinc atoms in essentially tetrahedral geometry but significant distortion is noted for ZnI2(AsMe3)2, which may be the result of unfavourable steric interactions.
Et3AsI2 与锌金属粉末的反应生成了二聚体配合物 [ZnI2(AsEt3)]2,而 Me3AsI2 的反应则得到了等摩尔的 ZnI2(AsMe3)2 和 ZnI2,后者通过 X 射线粉末衍射法确认。两个砷烷配合物已被结构表征,因此它们代表了锌(II) 的唯一例子。通过改变 R3AsI2 化合物中的 R 取代基,观察到了结构变化。配合物 ZnI2(AsMe3)2 是含有第 15 族供体原子的锌(II) 双配体配合物的唯一例子。两个配合物中的锌原子基本上呈四面体几何形状,但 ZnI2(AsMe3)2 显示出显著的畸变,这可能是由于不利的立体相互作用所致。