Ruthenium bidentate phosphine complexes for the coordination and catalytic dehydrogenation of amine- and phosphine-boranes.
Ruthenium bidentate phosphine complexes for the coordination and catalytic dehydrogenation of amine- and phosphine-boranes.
复制标题
二齿膦钌配合物,用于胺硼烷和膦硼烷的配位和催化脱氢。
DOI:
10.1002/chem.201100101
复制
发表时间:
2011
期刊:
影响因子:
--
通讯作者:
Ledger AE
中科院分区:
文献类型:
--
作者:
Ledger AE
Addition of the amine–boranes H3B⋅NH2tBu, H3B⋅NHMe2and H3B⋅NH3to the cationic ruthenium fragment [Ru(xantphos)(PPh3)(OH2)H][BArF4] (2; xantphos=4,5‐bis(diphenylphosphino)‐9,9‐dimethylxanthene; BArF4=[B{3,5‐(CF3)2C6H3}4]−) affords the η1‐BH bound amine–borane complexes [Ru(xantphos)(PPh3)(H3B⋅NH2tBu)H][BArF4] (5), [Ru(xantphos)(PPh3)(H3B⋅NHMe2)H][BArF4] (6) and [Ru(xantphos)(PPh3)(H3B⋅NH3)H][BArF4] (7). The X‐ray crystal structures of5and7have been determined with [BArF4] and [BPh4] anions, respectively. Treatment of2with H3B⋅PHPh2resulted in quite different behaviour, with cleavage of the BP interaction taking place to generate the structurally characterised bis‐secondary phosphine complex [Ru(xantphos)(PHPh2)2H][BPh4] (9). The xantphos complexes2,5and9proved to be poor precursors for the catalytic dehydrogenation of H3B⋅NHMe2. While the dppf species (dppf=1,1′‐bis(diphenylphosphino)ferrocene) [Ru(dppf)(PPh3)HCl] (3) and [Ru(dppf)(η6‐C6H5PPh2)H][BArF4] (4) showed better, but still moderate activity, the agostic‐stabilised N‐heterocyclic carbene derivative [Ru(dppf)(ICy)HCl] (12; ICy=1,3‐dicyclohexylimidazol‐2‐ylidene) proved to be the most efficient catalyst with a turnover number of 76 h−1at room temperature.
登录
查看更多内容
影响因子:
2.8
作者:
K. Abdur-Rashid;Terry Fedorkiw;A. Lough;R. Morris
通讯作者:
K. Abdur-Rashid;Terry Fedorkiw;A. Lough;R. Morris
影响因子:
--
作者:
C. Tang;A. Thompson;S. Aldridge
通讯作者:
C. Tang;A. Thompson;S. Aldridge
影响因子:
--
作者:
Takahiro Yasue;Y. Kawano;M. Shimoi
通讯作者:
M. Shimoi
DOI:
10.1002/chem.200901736
发表时间:
2009
期刊:
Chemistry (Weinheim an der Bergstrasse, Germany)
影响因子:
--
作者:
Burling S
通讯作者:
Burling S
DOI:
10.1002/9780470132449.ch26
发表时间:
2007
期刊:
--
影响因子:
--
作者:
R. A. Schunn;E. Wonchoba;G. Wilkinson
通讯作者:
G. Wilkinson