METAL-METAL BONDED COMPOUNDS .4. STABILIZATION OF METAL-METAL BONDING BY BRIDGING ASYMMETRIC FORMAMIDINO LIGANDS IN COMPLEXES [(PH3P)2(CO)IRM(RNC(H)NR')CL] (M=CU,AG - R=ALKYL, R'=P-TOLYL)

被引:18
作者
VANVLIET, PI [1 ]
VANKOTEN, G [1 ]
VRIEZE, K [1 ]
机构
[1] UNIV AMSTERDAM,JH VANTHOFF INST,ANORGAN CHEM LAB,NL-1018 WV AMSTERDAM,NETHERLANDS
关键词
D O I
10.1016/S0022-328X(00)85880-5
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Reactions of [(Ph3P)2(CO)IrCl] with [M(RNC(H)NR′)]n (M Cu, Ag; R Me, Et, i-Pr, t-Bu, cyclohexyl; R′ p-tolyl; n 2,4) afforded the complexes [(Ph3P)2-(CO)IrM(RNC(H)NR′)] in which the formal Ir- to -M donor bond is stabilized by a bridging formamidino group. The corresponding RhM compounds could not be isolated. The ease of formation and the stability of the complexes fall in the sequences IrI ≫ RhI; AgI ≫ CuI and small R groups ≫ bulky R groups. For small R groups two isomers may be formed, the NR group being bonded either to IR or to Ag. In the case of bulky R groups the NR group is always bonded to Ag because of steric interaction of the NR group with the two phosphine ligands on Ir. Reaction with CO gives unstable products which probably contain an acylformamidino group and two terminal CO groups. © 1979.
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页码:105 / 115
页数:11
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