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Synthesis, Structure and Chemical Transformations of Ethynylgermatranes
Author(s) -
Lukevics Edmunds,
Arsenyan Pavel,
Belyakov Sergey,
Pudova Olga
Publication year - 2003
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200300236
Subject(s) - chemistry , triethylamine , triethanolamine , acetylene , boiling , ethanol , organic chemistry , medicinal chemistry , hexane , analytical chemistry (journal)
Ethynylgermatranes have been prepared from monosubstituted acetylenes by a three‐step synthesis without isolation of the hydrolytically unstable intermediate chlorogermanes and ethoxygermanes. Boiling an equimolar mixture of tetrachlorogermane Cl 4 Ge, acetylene RC≡CH and triethylamine in hexane leads to germylation of the C sp −H bond and the formation of ethynyl‐substituted trichlorogermanes. Subsequent alkoxylation of chlorogermanes by ethanol in the presence of triethylamine affords triethoxygermanes that then take part in transalkoxylation with triethanolamine to give ethynylgermatranes. The molecular structures of all ethynylgermatranes and the hexacarbonyldicobalt complex of 1‐heptynylgermatrane have been determined by X‐ray crystallography. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)