Methyl-and phenyl-mercury(II) ions reacted, in the molar ratio 2 : 1, with bidentate phosphines L–L to give binuclear complexes of general formula [RHg(L–L)HgR]2+. [L–L = Ph2P(CH2)nPPh2, n= 1–3]. When an excess of the phosphine ligand is present an intermolecular exchange process occurs which leads to the formation of the symmetrically substituted compounds, HgR2 and [Hg(L–L)2]2+. The reactions in solution have been studied by multinuclear NMR spectroscopy; the structure of the bimetallic species was deduced with the aid of computer simulation. The single-crystal structure of [Hg(Ph2PCH2CH2PPh2)2][O3SCF3]2[orthorhombic, space group Pbcn, a= 17.141(3), b= 20.158(3), c= 15.614(9)Å, Z= 4] showed the mercury atom to be in a distorted-tetrahedral configuration.
甲基汞离子和
苯基汞离子(II)以2:1的摩尔比与二齿膦L-L反应,生成一般式为[RHg(L-L)HgR]2+的双核络合物。[L-L=Ph2P(
CH2)nPPh2,n=1-3]。当存在过量的
膦配体时,会发生分子间交换过程,从而形成对称取代的化合物HgR2和[Hg(L-L)2]2+。溶液中的反应已通过多核核磁共振光谱法进行了研究