| Abstract
| - The synthesis of novel heteroleptic germanium(II) compounds starting from [2,4-di-tert-butyl-6-((dimethylamino)methyl)phenyl]germanium chloride, MamxGeCl (1), is reported. 1reacts with potassium alkoxides to give the alkoxy-substituted compounds MamxGeO-t-Bu(2), MamxGeO-i-Pr (3), MamxGeOEt (4), and MamxGeOMe (5). The ethynyl-substitutedspecies MamxGe(C⋮CPh) (6) and MamxGe(C⋮CH) (7) are obtained by the reaction of 1with LiC⋮CPh and NaC⋮CH, respectively. The alkyl-substituted germanium(II) speciesMamxGeR (R = t-Bu (8), n-Bu (9), Me (10)) are formed by the reaction of 1 with thecorresponding alkyllithium compounds. Derivatization of 8−10 with MeI leads to theformation of compounds containing the germyl cations [MamxGe(t-Bu)(Me)]+ (11a), [MamxGe(n-Bu)(Me)]+ (12a), and [MamxGe(Me)2]+ (13a), respectively. All new species have beencharacterized by NMR, MS, and microanalytical data. X-ray crystal structure determinationsare presented for 3, 4, 6, 7, and 11.
- [2,4-Di-tert-butyl-6-((dimethylamino)methyl)phenyl]germanium chloride (MamxGeCl) reacts with various nucleophiles to give thermally stable heteroleptic alkoxy-, ethynyl-, and alkyl-substituted germanium(II) compounds. Reaction of the alkyl-substituted compounds with MeI leads to the formation of ionic species containing germyl cations. In all compounds a strong N→Ge interaction is observed.
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