Crystal structure and thermal decomposition of the Silanimine tBu(2)Si=N-SitBu(3)center dot thf

摘要

The thf-complexed silanimine tBu(2)Si=N-SitBu(3)center dot thf(1(thf); monoclinic, space group C2/c) was prepared by the reaction of 1 equivalent of tBu(2)SiClN(3) with 1 equivalent of Na[SitBu(3)] in Bu2O and subsequent addition of thf. By heating a benzene solution over a period of 11 d -140 degrees C, 1(thf) slowly released the thf donor to form the uncomplexed silanimine 1. However, under these conditions the silanimine 1 is unstable and is thermolized to give the ene reaction product of 1 with isobutene, H2C=C(CH(2)SitBu(2)-NH-SitBu(3))(2). By contrast, the thermolysis reaction of Me2Si=N-SitBu(3)center dot thf yielded the silanimine dimer (Me(2)SiNSitBu(3))(2) in 51 % and the vinyl ether Me2Si(OCH=CH2)NHSitBu(3) in 49 % yield.