PUB - Publikationen an der Universität Bielefeld

The synthesis of novel heteroleptic germanium(II) compounds starting from [2,4-di-tertbutyl-6-((dimethylamino)methyl)phenyl]germanium chloride, MamxGeCL(1), is reported. 1 reacts with potassium alkoxides to give the alkoxy-substituted compounds MamxGeO-t-Bu (2), MamxGeO-i-Pr (3), MamxGeOEt (4), and MamxGeOMe (5). The ethynyl-substituted species MamxGe(C=CPh) (6) and MamxGe(C=CH) (7) are obtained by the reaction of 1 with LiC=CPh and NaC=CH, respectively. The alkyl-substituted germanium(II) species MamxGeR (R = t-Bu (8), n-Bu (9), Me (10)) are formed by the reaction of 1 with the corresponding alkyllithium compounds. Derivatization of 8-10 with Mel leads to the formation 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 been characterized by NMR, MS, and microanalytical data. X-ray crystal structure determinations are presented for 3, 4, 6, 7, and 11.