27258-70-4Relevant articles and documents
Facile synthesis of an unsaturated spiro germane by hydroalumination and intramolecular 1,1-carbalumination
Uhl, Werner,Rohling, Martina,Wuerthwein, Ernst-Ulrich,Ghavtadze, Nugzar,Bergander, Klaus
, p. 5236 - 5240 (2010)
Treatment of the tetraethynylgermanium compound Ge(C≡CC 6H5)4 4 with 2 equiv of H-Al[CH(SiMe 3)2]2 yielded the addition product Ge(C≡CC6H5)2[C{AlR2}=C(H) C6H5]2 (5, R = CH(SiMe3) 2) by reduction of two of its C≡C triple bonds. Heating of 5 to 260 °C for 10 min gave a unique rearrangement reaction which via intramolecular 1,1-carbalumination afforded the spiro germane 6 (a 3,7-bis[1-phenylmeth-(Z)-ylidene]-4-germaspiro[3,3]hepta-1,5-diene derivative). The molecular structure of 6 comprises two unsaturated 1-germacyclobut-2-ene heterocycles with a joint germanium atom and two exocyclic C=C double bonds.