cyclo-Boratrisiloxane and cyclo-diboratetrasiloxane derivatives and their reactions with amines: crystal and molecular structure of (p-BrC6H4BO)2(Ph2SiO)2
作者:Michael A. Beckett、David E. Hibbs、Michael B. Hursthouse、K.M.Abdul Malik、Paul Owen、K.Sukumar Varma
DOI:10.1016/s0022-328x(99)00631-2
日期:2000.2
new cyclo-diboratetrasiloxanes (RBO)2(R′2SiO)2 (R=p-BrC6H4, o-MeC6H4, m-NH2C6H4, m-NO2C6H4, Bun; R′2=Ph2, R=Ph, p-BrC6H4, m-NO2C6H4; R′2=octn/Me) and cyclo-boratrisiloxanes (RBO)(R′2SiO)2 (R=p-BrC6H4, m-NH2C6H4; R′2=Me2, Ph/Me) were prepared in high yield by condensation reactions. cyclo-Diboratetrasiloxane·amine adducts (1:1) were obtained for (PhBO)2(Ph2SiO)2 with cyclohexylamine, triethylamine,
新的环-diboratetrasiloxanes(RBO)2(R' 2的SiO)2(R = p -BrC 6 ħ 4,ö -MeC 6 ħ 4,米-NH 2 ç 6 ħ 4,米-NO 2 ç 6 ħ 4卜ñ ; R' 2 =苯基2,R =苯基,p -BrC 6 ħ 4,米-NO 2 ç 6 ħ4 ; R' 2 =辛Ñ / Me)中和环-boratrisiloxanes(RBO)(R' 2的SiO)2(R = p -BrC 6 ħ 4,中号-NH 2 ç 6 ħ 4 ; R' 2 =我2中,Ph / Me)通过缩合反应高产率地制备。环为(PhBO)获得:-Diboratetrasiloxane·胺加合物(11)2(PH 2的SiO)2与环己胺,三乙胺,哌啶和异丁胺和(ø -MeC 6H 4 BO)2(Ph 2 SiO)2和吗啉;相反,环-硼三硅氧烷对胺不反应。这些硼硅氧烷环的路易斯酸度是通过