conditions (dinitrogen, ambient temperature, CH2Cl2, PPN+ as counterion) have been adopted. [PtI2(CO)]2 (10‘) interacts with [PPN][IrI3(CH3)(CO)2] (4-PPN), affording the monoiodo-bridged anionic species [IrI2(CH3)(CO)2(μ-I)PtI2(CO)]- (11), which undergoes cleavage under CO to provide [IrI2(CH3)(CO)3] (6) and [PtI3(CO)]- (9). Although we have to take into account the possible iodide dissociation from 4 in the
当将羰基
碘铂二聚体[PtI 2(CO)] 2(10 ')添加到反应混合物中时,参与
甲醇羰基化的
铱配合物的催化活性显着增强。在CO下,该络合物容易得到单体种类[PtI 2(CO)2 ](10)。在30 bar的CO和190°C的温度下,对于Pt / Ir = 3/7摩尔比,仅
铱的周转频率值为1450 h -1,达到2400 h -1。要更深入地了解
铂助
催化剂的作用,请模拟条件(二
氮,环境温度,CH 2 Cl 2,P
PN +作为抗衡离子)已被采用。[PtI 2(CO)] 2(10 ')与[P
PN] [IrI 3(CH 3)(CO)2 ](4-P
PN)相互作用,提供单
碘桥联的阴离子物质[IrI 2(CH 3)( (CO)2(μ-I)PtI 2(CO)] --(11),其在CO下裂解以提供[IrI 2(CH 3)(CO)3 ](6)和[PtI 3(CO)] -(9)。尽管我们必须考虑在极性反应介质(CH