Electrophilic Attack on the Carbon Terminus of a Niobium-Bound Formaldehyde Ligand
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- 作者：B. Thiyagarajan ; Margaret E. Kerr ; John C. Bollinger ; Victor G. Young ; Jr. ; and Joseph W. Bruno
- 刊名：Organometallics
- 出版年：1997
- 出版时间：March 18, 1997
- 年：1997
- 卷：16
- 期：6
- 页码：1331 - 1334
- 全文大小：135K
- 年卷期：v.16,no.6(March 18, 1997)
- ISSN：1520-6041
文摘
The niobocene formaldehyde complexCp'2Nb(Cl)(
2-CH2O) (1, Cp' =5-C5H4SiMe3)reacts with[Ph3C][BF4] to give an alkoxide(2) of formula [Cp'2Nb(Cl)(OCH2CPh3)][BF4]and with HBF4·OEt2 to giveanalogue 4([Cp'2Nb(Cl)(OMe)][BF4]);these processesconstitute examples of electrophilic attack on the formaldehyde carbon, instead of the more typical additionat oxygen. Compound 2 is hydrolyzed toCp'2Nb(Cl)(OBF3) (3), a Lewis acid adduct of thecorrespondingmetal oxide; both 2 and 3 have been characterizedbyX-ray crystallography.
2-CH2O) (1, Cp' =5-C5H4SiMe3)reacts with[Ph3C][BF4] to give an alkoxide(2) of formula [Cp'2Nb(Cl)(OCH2CPh3)][BF4]and with HBF4·OEt2 to giveanalogue 4([Cp'2Nb(Cl)(OMe)][BF4]);these processesconstitute examples of electrophilic attack on the formaldehyde carbon, instead of the more typical additionat oxygen. Compound 2 is hydrolyzed toCp'2Nb(Cl)(OBF3) (3), a Lewis acid adduct of thecorrespondingmetal oxide; both 2 and 3 have been characterizedbyX-ray crystallography.