om049921z_si_002.cif (28.18 kB)

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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posted on 07.06.2004, 00:00 by Anne F. Richards, Marcin Brynda, Marilyn M. Olmstead, Philip P. Power
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.

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