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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis and structure of cationic guanidinate-bridged bimetallic {Li _7M} cubes (M = Mn, Co, Zn) with inverse crown counter anions
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Synthesis and structure of cationic guanidinate-bridged bimetallic {Li _7M} cubes (M = Mn, Co, Zn) with inverse crown counter anions

机译:带有反向冠抗衡阴离子的阳离子胍基桥联双金属{Li _7M}立方晶体(M = Mn,Co,Zn)的合成与结构

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摘要

The reactions of the heteroleptic lithium amide [Li_3(μ-hmds) _2(μ,μ-hpp)] (1), where [hmds]~- = hexamethyldisilazide and [hpp]~- = hexahydropyrimidopyrimidide, with MnCl_2, CoCl_2 or ZnBr2 result in the formation of the separated ion-pairs [MLi_7(μ_8~-O)(μ,μ-hpp) _6]~+[A]~-, which each consist of a {MLi _7} oxo-centred cube structural motif (M = Mn 2, Co 4, Zn 5), with each face of the cube being bridged by an [hpp]- ligand. In the case of M = Mn and Co, the counter ion, [A]-, is the pentagonal anionic inverse crown [{Li(μ-hmds)}5(μ_5-Cl)]~- (3), whereas the reaction with M = Zn produces the known tris-amido zincate [Zn(hmds)_3]~- counter anion.
机译:杂锂酰胺锂[Li_3(μ-hmds)_2(μ,μ-hpp)](1)的反应,其中[hmds]〜-=六甲基二硅叠氮化物,[hpp]〜-=六氢嘧啶并嘧啶化物与MnCl_2,CoCl_2或ZnBr2导致形成分离的离子对[MLi_7(μ_8〜-O)(μ,μ-hpp)_6]〜+ [A]〜-,每个离子对均由{MLi _7}以氧为中心的立方结构基序组成(M = Mn 2,Co 4,Zn 5),立方体的每个面都由[hpp]-配体桥接。在M = Mn和Co的情况下,抗衡离子[A]-是五角形阴离子反冠[{Li(μ-hmds)} 5(μ_5-Cl)]〜-(3),而反应M = Zn时,会生成已知的三酰胺基锌酸盐[Zn(hmds)_3]〜抗衡阴离子。

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