THERMODYNAMICS OF HOMOGENEOUS HYDROGENATION .6. THERMODYNAMICS OF THE HOMOGENEOUS HYDROGENATION OF CYCLOHEXENE CATALYZED BY RH(I) AND IR(I) COMPLEXES OF POLYDENTATE PHOSPHINE-LIGANDS

被引:4
作者
KHAN, MMT [1 ]
KHAN, BT [1 ]
BEGUM, S [1 ]
ALI, SM [1 ]
机构
[1] OSMANIA UNIV,DEPT CHEM,HYDERABAD 500007,ANDHRA PRADESH,INDIA
来源
JOURNAL OF MOLECULAR CATALYSIS | 1988年 / 49卷 / 01期
关键词
Catalysis - Iridium Compounds - Phosphorus Compounds - Rhodium Compounds - Thermodynamics;
D O I
10.1016/0304-5102(88)80054-3
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The oxidative addition of H2 to the mixed ligand Rh(I) complex [RhCl(PPh3)(diphos)] 1 and the Rh(I) and Ir(I) complexes of the terdentate ligands NP3, [N(CH2CH2PPh2)3] and triphos, [PhP(CH2CH2PPh2)2], MLCl 2-5 (where M = Rh(I), Ir(I); L = NP3, triphos) proceeds at 30°C and 1 atm of H2 in ethanol-benzene. The homogeneous hydrogenation of cyclohexene catalyzed by complexes 1-5 was investigated in the temperature range 10-40°C at 0.6-1 atm of H2 partial pressure. Thermodynamic parameters for the formation of the dihydrido complexes of 1-5 and the monoolefin complexes of Rh(I) and Ir(I) were computed. The activation parameters corresponding to the rate constant k for the homogeneous hydrogenation of cyclohexene were also calculated.
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页码:43 / 58
页数:16
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