Spectroscopic and crystallographic studies of phosphino adducts of gallium(III) iodide
Spectroscopic and crystallographic studies of phosphino adducts of gallium(III) iodide
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碘化镓膦加合物的光谱和晶体学研究
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
E. Wells
中科院分区：
文献类型：
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作者：
Martyn A. Brown;D. G. Tuck;E. Wells
化合物Gal3·PPh3和Ga2I6·dppe ( dppe = 1,2-双(二苯基膦基)乙烷 )的固态结构已被确定。对于前者，GaI3P核具有C3v对称性，结构为三角形，a = 14.961(2) A，c = 16.509(3) A，V = 3199.5(4) A3，Z = 6，空间群 。在Ga2I6•dppe中，配体桥接两个Gal3P中心；结构为单斜晶系，a = 10.196(7) A，b = 15.363(1) A，c = 23.027(9) A，β = 98.735(4)°， V = 3565.1(3.2) A3Z = 4，空间群P21/n 利用31P NMR光谱表明Gal3•PPh3在非水溶液中轻微解离，并研究了添加Ph3P或I−的影响。 Ga2I6•dppe 的类似研究也有报道。在每个系统中，镓的四配位占主导地位；同样重要的因素是这些溶液中未络合的 GaI3 到 Ga2I6 的二聚化。关键词：碘化镓(III)、配合物、磷、NMR、晶体学。
The solid state structures of the compounds GaI3•PPh3 and Ga2I6•dppe ( dppe = 1,2-bis(diphenylphosphino)ethane ) have been determined. For the former, in which the GaI3P core has C3v symmetry, the structure is trigonal, with a = 14.961(2) A, c = 16.509(3) A, V = 3199.5(4) A3, Z = 6, space group . In Ga2I6•dppe, the ligand bridges two GaI3P centres; the structure is monoclinic, a = 10.196(7) A, b = 15.363(1) A, c = 23.027(9) A, β = 98.735(4)°, V = 3565.1(3.2) A3Z = 4, space group P21/n The use of 31P NMR spectroscopy shows that GaI3•PPh3 is slightly dissociated in nonaqueous solution, and the effect of adding Ph3P or I− has been investigated. Similar studies with Ga2I6•dppe are also reported. In each system, four-coordination at gallium is dominant; an equally important factor is the dimerization of uncomplexed GaI3 to Ga2I6 in these solutions. Keywords: gallium(III) iodide, complexes, phosphorus, NMR, crystallography.