Bis[(3,5-dimethyl-1-pyrazolyl)methyl]ethylamine -: A versatile ligand for complexation in RhI cationic complexes

被引：0

作者：

Mathieu, R

Esquius, G

Lugan, N

Pons, J

Ros, J

机构：

[1] CNRS, Chim Coordinat Lab, F-31077 Toulouse 4, France

[2] Univ Autonoma Barcelona, Dept Quim, Bellaterra 08193, Cerdanyola, Spain

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2001年 / 10期

关键词：

rhodium; aminopyrazole; hemilabile ligands; cationic complexes;

D O I：

暂无

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The bis[(3,5-dimethyl-1-pyrazolyl)methyl]ethylamine ligand (1) reacts with [Rh(COD)(THF)(2)][BF4] leading to [Rh(COD)(1)][BF4] ([2][BF4]) in which 1 is kappa (3) bonded in the solid state. Because of the steric bulk of 1,5-cyclooctadiene, it prefers the kappa (2) mode of bonding in solution. Substitution of 1,5-cyclooctadiene by carbon monoxide generates [3] [BF4] in which 1 is kappa (3) bonded in solution and solid state. Variable temperature NMR spectroscopic studies give evidence of a kappa (3) reversible arrow kappa (2) equilibrium in solution. [3][BF4] is easily decarbonylated to [Rh(CO)(1)][BF4] [4][BF4] in which 1 is kappa (3) bonded; however on bubbling carbon monoxide through, [3][BF4] is regenerated. The single-crystal X-ray structures of [2][BF4], [3][BPh4], and [4][BPh4] are reported.

引用

页码：2683 / 2688

页数：6

共 31 条

[1] Ruthenium dihydride RuH2(PPh3)2((R,R)-cyclohexyldiamine) and ruthenium monohydride RuHCl(PPh3)2((R,R)-cyclohexyldiamine):: Active catalyst and catalyst precursor for the hydrogenation of ketones and imines [J].