Mono- and Homobimetallic Vanadium Complexes: Borane Adducts of Vanada(IV)azirine Complexes
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- 作者：Robert Choukroun ; Christian Lorber ; Laure Vendier ; and Bruno Donnadieu
- 刊名：Organometallics
- 出版年：2004
- 出版时间：November 8, 2004
- 年：2004
- 卷：23
- 期：23
- 页码：5488 - 5492
- 全文大小：144K
- 年卷期：v.23,no.23(November 8, 2004)
- ISSN：1520-6041
文摘
The reaction between [VCp2], BPh3, or BCl3 and the nitrile F3CC6H4C
N gives the boraneadduct of vanada(IV)azirine complex [VCp2{
2:C,N-F3CC6H4C=N·BR3}] (R = Ph (2), Cl (3)).Using B(C6F5)3 and dicyano compounds such as 1,4-benzene dicarbonitrile NC(C6H4)CNand adiponitrile NC(CH2)4CN, an access to homobimetallic vanadium complexes wasobtained and complexes [(VCp2)2{2:C,N-(C6F5)3B·N=C(C6H4)C=N·B(C6F5)3}] (6) and [(VCp2)2{2:C,N-(C6F5)3B·N=C(CH2)4C=N·B(C6F5)3}] (8) are formed. Malononitrile NCCH2CN inthe presence of 2 equiv of B(C6F5)3 and 1 or 2 equiv of [VCp2] gave the monometallic complex[(VCp2){2:C,N-(C6F5)3B·N=CCH2CN·B(C6F5)3}] (7). Complexes 2, 3, 7, and 8 werecharacterized by X-ray structure determination. All these complexes are paramagnetic toone electron per vanadium.
N gives the boraneadduct of vanada(IV)azirine complex [VCp2{2:C,N-F3CC6H4C=N·BR3}] (R = Ph (2), Cl (3)).Using B(C6F5)3 and dicyano compounds such as 1,4-benzene dicarbonitrile NC(C6H4)CNand adiponitrile NC(CH2)4CN, an access to homobimetallic vanadium complexes wasobtained and complexes [(VCp2)2{2:C,N-(C6F5)3B·N=C(C6H4)C=N·B(C6F5)3}] (6) and [(VCp2)2{2:C,N-(C6F5)3B·N=C(CH2)4C=N·B(C6F5)3}] (8) are formed. Malononitrile NCCH2CN inthe presence of 2 equiv of B(C6F5)3 and 1 or 2 equiv of [VCp2] gave the monometallic complex[(VCp2){2:C,N-(C6F5)3B·N=CCH2CN·B(C6F5)3}] (7). Complexes 2, 3, 7, and 8 werecharacterized by X-ray structure determination. All these complexes are paramagnetic toone electron per vanadium.