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The reaction of IrH3(PPh3)3 with p-anisyldiazonium tetrafluoroborate gives an insertion product which very easily undergoes orthometalation, yielding [IrH(PPh3)3NHNC6H3OMe]+BF4− (V), the structure of which is tentatively assigned. By reaction with halides X−, the metalated fluoborate gives the neutral IrHX(PPh3)2NHNC6H3OMe, which with halogens X2 affords IrX2(PPh3)2NHNC6H3OMe, the structure of which has previously been determined.

The preparation of Ir2(CO)6(PPh3)2 by a new route is described, as are the reaction of this compound with hydrogen, mercury, tin(II) chloride, hydrogen halides and halogens, leading to new monophosphine carbonyl iridium compounds. The [Ir(CO)3PPh3]- anion has been isolated as the tris(phenanthroline)nickel salt.

The compounds obtained by reaction of 2-alkenols with tricarbonylbis(triphenylphosphine)iridium cation in basic medium, are alkenyloxycarbonyl derivatives, in which the alkenyloxycarbonyl moiety is chelated through a σ and a η bond.

New platinum derivatives, having oxidation number zero, with triarylphosphines, triarylarsines, triarylphosphites are described. Some of these compounds are coordinatively saturated, i. e. of the type Pt°(PAr3)4, other are unsaturated, of the type Pt°(PAr3)3. The phosphine derivatives reacts with carbon monoxide giving mixed carbonyl-phosphine derivatives.

The hexanuclear [Ir6(CO)15]2– anion, the mononuclear [Ir(CO)4]– anion and the cluster complex Ir6(CO)16 have been obtained for the first time.