para-Hydrogen enhanced NMR signals aid detection of minor isomers of complexes IrH2(L)2(CO)Cl (L = PPh3, PMe3, PPh2Cl and AsPh3) containing magnetically inequivalent hydride ligands that are produced via addition across the LâIrâL axis of Ir(L)2(CO)Cl: in the case of L = PPh3, reaction with CO and H2 is shown to yield the substitution product IrH2(CO)2(PPh3)Cl which reacts further via HCl transfer to form IrH(CO)(PPh3)2Cl2 and thereby enables the detection of IrH3(CO)2(PPh3).
对氢增强的核磁共振信号有助于检测IrH2(L)2(CO)Cl(L = PPh3、PMe3、PPh2Cl和AsPh3)的次要异构体,这些化合物含有磁不等的
氢化物配体,通过Ir(L)2(CO)Cl的L-Ir-L轴上的加成反应生成:在L = PPh3的情况下,与CO和H2的反应生成取代产物IrH2(CO)2(PPh3)Cl,该产物通过HCl转移进一步反应生成IrH(CO)(PPh3)2Cl2,从而能够检测IrH3(CO)2(PPh3)。