Cheng Fei, Hector Andrew L, Levason William, Reid Gillian, Webster Michael, Zhang Wenjian
School of Chemistry, University of Southampton, Highfield, Southampton, UKSO17 1BJ.
Dalton Trans. 2007 Jun 7(21):2207-10. doi: 10.1039/b702791e. Epub 2007 Apr 13.
The preparation and crystal structures of the first examples of gallium halide complexes with the tripodal arsine, MeC(CH(2)AsMe(2))3, reveal three distinctly different coordination modes for the ligand; the neutral [{micro(3)-MeC(CH(2)AsMe(2))3-kappaAs:kappaAs':kappaAs''}(GaI(3))3] with the triarsine coordinating to three GaI(3) units, [{Me(2)AsCH(2)C(Me)(CH(2)AsMe(2))2-kappa(2)AsAs'}GaCl(2)][GaCl(4)] involving bidentate chelation to a GaCl2+ cationic unit with the third As donor atom uncoordinated, and [{MeC(CH(2)AsMe(2))3-kappaAs:kappa(2)As'As''}(GaCl3)(GaCl2)][GaCl4] in which the triarsine forms a bidentate chelate to the GaCl2+ unit and the third As donor atom binds to a further GaCl3 unit.
含三脚架型胂（MeC(CH(2)AsMe(2))3）的卤化镓配合物的首批实例的制备及晶体结构揭示了该配体三种截然不同的配位模式；中性配合物[{μ(3)-MeC(CH(2)AsMe(2))3-κAs:κAs':κAs''}(GaI(3))3]中三胂与三个GaI(3)单元配位，[{Me(2)AsCH(2)C(Me)(CH(2)AsMe(2))2-κ(2)AsAs'}GaCl(2)][GaCl(4)]涉及二齿螯合至一个GaCl2+阳离子单元，第三个As供体原子未配位，以及[{MeC(CH(2)AsMe(2))3-κAs:κ(2)As'As''}(GaCl3)(GaCl2)][GaCl4]，其中三胂与GaCl2+单元形成二齿螯合物，且第三个As供体原子与另一个GaCl3单元结合。
