Iridium complexes nitrates

Complex [(CXI )Ir(/j,-pz)(/i,-SBu )(/j,-Ph2PCH2PPh2)Ir(CO)] reacts with iodine to form 202 (X = I) as the typical iridium(II)-iridium(II) symmetrical species [90ICA(178)179]. The terminal iodide ligands can be readily displaced in reactions with silversalts. Thus, 202 (X = I), upon reaction with silver nitrate, produces 202 (X = ONO2). Complex [(OC)Ir(/i,-pz )(/z-SBu )(/i-Ph2PCH2PPh2)Ir(CO)] reacts with mercury dichloride to form 203, traditionally interpreted as the product of oxidative addition to one iridium atom and simultaneous Lewis acid-base interaction with the other. The rhodium /i-pyrazolato derivative is prepared in a similar way. Unexpectedly, the iridium /z-pyrazolato analog in similar conditions produces mercury(I) chloride and forms the dinuclear complex 204. 

The imidazole complex raras-[Ir(imid)2Cl4]- is stable for days in neutral aqueous solution, and for hours in the presence of added thiocyanate. Addition of silver nitrate precipitates the silver salt of the complex, with no indication of Ag+-catalyzed removal of coordinated chloride. Thus this iridium(III) complex is substitutionally much more inert than its much-studied (because (potentially) anti-tumor) ruthenium(III) analogue (96). 

BCIF4I1OP2C37H3, Iridium(ll), carbonyl-chlorohydrido[tetrafluoFoborato(l - ))-bis(triphenylphosphine)-, 26 117,28 23 BClF4lrOP2C3gH33, Iridium(III), carbonyl-chloromethyl[tetrafluoroborato(l—)]-bis( triphenylphosphine)-, 26 118,28 24 BF4, Borate(l—), tetrafluoro-, molybdenum and tungsten complexes, 26 96-105 BF4AuIr3N03P7C,gH,3, Borate(l-), tetrafluoro-, tris[l,2-ethanediylbis(diphenyl-phosphine)]hexahydrido[(triphenyl-phosphine)gold]triiridium(2+) nitrate (1 1 1), 29 291... 

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