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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Carboranylamidinates
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Carboranylamidinates

机译：碳硼酰胺

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摘要

This Research Report provides an overview on synthesis, structure, and reactivity of the recently discovered carboranylamidinate ligands. Carboranylamidinate anions of the type [(o-C_2B_(10)H _(10)C(NHR)(=NR)]- (R = iPr, cyclohexyl) are readily accessible via addition of o-lithiocarborane to N,N′-carbodiimides R-N=C=N-R. They combine the highly versatile characteristics of both amidinates and carboranes in one unique ligand system. Unlike simple amidinate anions, the carboranylamidinates coordinate to metal ions not as typical N,N′-chelating ligands but adopt an unexpected κ~2C, N-bonding mode. The free imine functionality in carboranylamidinates can be further deprotonated. The resulting dianions were demonstrated to be excellent starting materials for novel boron-rich heterocycles incorporating e.g. Si, Sn, P, or transition metals such as Ti, Zr, Rh, and Ir. Further modification of the carboranylamidinate cage structure includes the introduction of additional functional groups like -SH or -SeH as well as the selective removal of a boron atom with formation of novel nido-type dicarbollylamidinate ligands. An initial study already showed that transition metal carboranylamidinates are potentially useful as polymerization catalysts.
机译：这份研究报告概述了最近发现的碳硼亚酰胺基配体的合成，结构和反应性。 [[o-C_2B_（10）H _（10）C（NHR）（= NR）]-（R = iPr，环己基）类型的碳硼酰胺基阴离子可通过在N，N'-碳二亚胺RN = C = NR。它们在一个独特的配体体系中结合了a酰胺和碳硼烷的高度通用性。与简单的a酰胺阴离子不同，碳硼酰胺在金属离子上的配位不是典型的N，N'-螯合配体，而是采用意想不到的κ 〜2C，N键模式，可进一步使碳硼烷酰胺中的游离亚胺官能团去质子化。所得的二价阴离子是新型富硼杂环化合物（例如，Si，Sn，P或Ti， Zr，Rh和Ir。碳硼烷酰胺基笼结构的进一步修饰包括引入其他官能团（如-SH或-SeH）以及选择性去除硼原子并形成新型的Nido型二碳硼烷二酸酯配体。 dy已经表明过渡金属碳硼烷酰胺化物可能用作聚合催化剂。

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