摘要
The reactions of silylenes with organic azides are quite diverse, depending on the substituents of the silylene center and on the nature of the azide employed. Elusive silaimine with three-coordinate silicon atom (LSiN)-Si-1(2,6-Triip(2)-C6H3) (5) {L-1 = CH[(C=CH2)(CMe)(2,6-iPr(2)C(6)H(3)N)(2)] and Triip = 2,4,6-triisopropylphenyl) was synthesized by treatment of the silylene (LSi)-Si-1 (1) with a sterically demanding 2,6-bis(2,4,6-triisopropylphenyl)phenyl azide (2,6-Triip(2)C(6)H(3)N(3)). The reaction of Lewis base-stabilized dichlorosilylene (LSiCl2)-Si-2 (2) {L-2 = 1,3-bis(2,6-iPr(2)C(6)H(3))imidazol-2-ylidene} with Ph3SiN3 afforded four-coordinate silaimine L-2(Cl-2)SiNSiPh3 (6). Treatment of 2,6-Triip(2)C(6)H(3)N(3) with (LSiCl)-Si-3 (3) (L-3 = PhC(NtBu)(2)) yielded silaimine L-3(Cl)SiN(2,6-Triip(2)-C6H3) (7) possessing a four-coordinate silicon atom, The reactions of (LSiN)-Si-3(SiMe3)(2) (4) with adamantyl and trimethylsilyl azide furnished silaimine compounds with a four-coordinate silicon atom L-3(N(Ad)SiMe3)SiN(SiMe3) (8) (Ad = adamantyl) and L-3(N(SiMe3)(2))SiN(SiMe3) (9). Compound 8 was formed by migration of one of the SiMe3 groups. Compounds 5-9 are stable under inert atmosphere and were characterized by elemental analysis, NMR spectroscopy, and single-crystal X-ray studies.
- 出版日期2012-10-15