Characterization of Ge5R4 (R = CH(SiMe3)2, C6H3-2,6-Mes2): Germanium Clusters of a New Structural Type with Singlet Biradical Character
Characterization of Ge5R4 (R = CH(SiMe3)2, C6H3-2,6-Mes2): Germanium Clusters of a New Structural Type with Singlet Biradical Character
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Ge5R4 (R = CH(SiMe3)2, C6H3-2,6-Mes2) 的表征：具有单线态双自由基特征的新型结构类型的锗簇
DOI：
10.1021/om049921z
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发表时间：
2004
期刊：
影响因子：
2.8
通讯作者：
P. Power
中科院分区：
文献类型：
--
作者：
A. F. Richards;M. Brynda;M. Olmstead;P. Power
大体积有机锗(II)卤化物Ge(Cl){CH(SiMe3)2}和Ge(Cl)C6H3-2,6-Mes2（前者在GeCl2·（二恶烷）存在下）的还原得到了团簇Ge5R4（R = CH(SiMe3)2 (1), C6H3-2,6-Mes2 (2)），其具有未取代的锗原子覆盖蝴蝶Ge4R4 阵列。该键合涉及六个二中心双电子 Ge−Ge 键和未取代的锗处的孤对电子以及两个取代的锗处的非键合电子密度，这表明可能的双自由基特征。
Reduction of the bulky organogermanium(II) halides Ge(Cl){CH(SiMe3)2} and Ge(Cl)C6H3-2,6-Mes2 (the former in the presence of GeCl2·(dioxane)) afforded the clusters Ge5R4 (R = CH(SiMe3)2 (1), C6H3-2,6-Mes2 (2)), which have an unsubstituted germanium atom capping a butterfly Ge4R4 array. The bonding involves six two-center−two-electron Ge−Ge bonds and a lone pair at the unsubstituted germanium as well as nonbonded electron density at two of the substituted germaniums that indicates possible biradical character.