Highly Unsaturated Macrocyclic Organosilicon Compounds

Abstract

Abstract A series of 12-, 15-, 18-, 21-, 24-, 27- or 30-membered macrocyclic silahydrocarbons of general formula (MeRSiC≡C)n, n=4-10 and R = H, Me, CH2=CH were synthesized by reaction of Me2Si(C≡CMgBr)2, Me(CH2=CH)Si(C≡CMgBr)2, BrMgC≡CMe2SiC≡CSiMe2C≡CMgBr or BrMgC≡CMe,SiC≡CSiMe,C≡CSiMe2C≡CSiMe2C≡CMgBr with MeHSiCl2, Me2SiCl2, Me(CH2=CH)SiCl2 or (ClMe2SiC≡C)2SiMe2. 23-Membered spiromacrocyclic polyacetylenic silahydrocarbons containing 6 silicon atoms, 8 triple bonds and central Si or Ge atoms were prepared by reaction of Me2Si(C≡CSiMe2C≡CMgBr)2 with MC4, (M = Si, Ge).