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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Bridging and Terminal Coordination of Ga-Ga Bonds by the Chelating Ligands Imidotetraphenyldiphosphinate and -dithiodiphosphinate
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Bridging and Terminal Coordination of Ga-Ga Bonds by the Chelating Ligands Imidotetraphenyldiphosphinate and -dithiodiphosphinate

机译：螯合配体亚氨基四苯基二膦酸酯和-二硫代二膦酸酯对Ga-Ga键的桥接和末端配位

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摘要

Tetrakis[bis(trimethylsilyl)methyl]digallane(4) (1) reacted with imidotetraphenyldiphosphinic acid to yield two products, which were separated by recrystallization: The first one, bis[bis(trimethylsilyl)methyl]-imidotetraphenyldiphosphinato-O,O'-gallium (2), resulted from the cleavage of the Ga-Ga bond and contained a dialkylgallium unit, which was coordinated by a chelating imidodiphosphinato ligand. The digallium compound 1,2-bis[bis(trimethylsilyl)-methyl]-bis(#mu#-tetraphenyldiphosphinato-O,O')digallium (3) was formed as the second product by a substituent exchange reaction and the release of bis(trimethylsilyl)methane. Its Ga-Ga bond (245.7 pm) was bridged by two imidodiphosphinato ligands. In contrast, the reaction of digallane(4) 1 with the sulfur derivative imidotertraphenyldithiodiphosphinic acid afforded a complicated mixture of unknown products. A compound analogous to 3 containing two imidodithiodiphosphinato ligands (5) was, however, obtained in a moderate yield by the precipitation of lithium acetate, when we treated dialkyldi(#mu#-acetato)digalium (4) with lithium imidotetraphenyldithiodiphosphinate. Remarkably, the chelating ligands did not adopt a bridging position across the Ga-Ga bond (249.9 pm) similar to 3, but each one was terminally coordinated to one Ga atom.
机译：四[双（三甲基甲硅烷基）甲基] digallane（4）与亚氨基四苯基二膦酸反应生成两种产物，将其通过重结晶分离：第一种是双[双（三甲基硅烷基）甲基]-亚氨基四苯基二膦酸酯基-O，O'-镓（2），是由于Ga-Ga键断裂而形成的，含有二烷基镓单元，该单元由螯合的亚氨基二膦酸酯配体配位。通过取代基交换反应和双酚的释放，形成了第二化合物二镓化合物1,2-双[双（三（三甲基甲硅烷基）-甲基]-双（＃mu＃-四苯基二膦酸酯基-O，O'）二al（3）。 （三甲基甲硅烷基）甲烷。它的Ga-Ga键（245.7 pm）被两个亚氨基二膦酸酯配体桥接。相比之下，洋金刚烷（4）1与硫衍生物亚氨基四苯基二硫代次膦酸的反应提供了未知产物的复杂混合物。但是，当我们用亚氨基四苯基二硫代二膦酸锂处理二烷基二（＃-乙酰基）二金属（（4）时，通过乙酸锂的沉淀可以中等收率获得类似于3的化合物，其中含有两个亚氨基二硫代二膦基配体（5）。值得注意的是，螯合配体没有跨过Ga-Ga键（249.9 pm）的桥接位置，类似于3，但每个均与一个Ga原子末端配位。

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