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Boranyl-Functionalized [Ge9 ] Clusters: Providing the Idea of Intramolecular Ge/B Frustrated Lewis Pairs.

ABSTRACT: The unique three-dimensional structure of spherical, homoatomic nine-atom germanium clusters opens various possibilities for the spatial arrangement of functional groups. Ligands comprising lone pairs have recently been introduced in the cluster sphere, and we now report the addition of a boranyl group to the cluster featuring a Ge-B exo-cluster bond. The reaction of the twofold-silylated cluster [Ge9 {Si(TMS)3 }2 ]2- (TMS=trimethylsilyl) with 2-chloro-1,3,2-diazaborolidines DABR -Cl leads to the first boranyl-functionalized [Ge9 ] clusters [Ge9 {Si(TMS)3 }2 DABR ]- (R=methyl (1?a), iso-propyl (2?a), ortho-tolyl (3?a)). The anions 2?a and 3?a were structurally characterized as [NHCDipp Cu]+ complexes (NHCDipp =1,3-di(2,6-diisopropylphenyl)imidazolylidine) through single crystal X-ray structure determination. Quantum-chemical calculations manifest the frustrated Lewis pair (FLP) character of the boranyl-functionalized cluster [Ge9 {Si(TMS)3 }2 BCy2 ]- (4?a).

SUBMITTER: Wallach C 

PROVIDER: S-EPMC7898805 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Boranyl-Functionalized [Ge<sub>9</sub> ] Clusters: Providing the Idea of Intramolecular Ge/B Frustrated Lewis Pairs.

Wallach Christoph C   Geitner Felix S FS   Karttunen Antti J AJ   Fässler Thomas F TF  

Angewandte Chemie (International ed. in English) 20201201 5

The unique three-dimensional structure of spherical, homoatomic nine-atom germanium clusters opens various possibilities for the spatial arrangement of functional groups. Ligands comprising lone pairs have recently been introduced in the cluster sphere, and we now report the addition of a boranyl group to the cluster featuring a Ge-B exo-cluster bond. The reaction of the twofold-silylated cluster [Ge<sub>9</sub> {Si(TMS)<sub>3</sub> }<sub>2</sub> ]<sup>2-</sup> (TMS=trimethylsilyl) with 2-chloro  ...[more]

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