Iridium complexes dithiocarbamates

The first report (325) of iridium(IIl) dithiocarbamate complexes appeared in 1973. The procedure is straightforward, consisting in addition of an excess of NaR2dtc to sodium chloroiridate in aqueous methanol. On being kept for several days, an orange-yellow precipitate... 

Rhodium(I) and (III) complexes are well known, although there is still some debate about the existence and nature of compounds formulated to contain rhodium(II) dithiocarbamate centers. Relatively little work has been carried out on iridium complexes, although again the +1 and +3 states are both accessible. The +4 oxidation states can also be generated for both metals, and somewhat unusually, rhodium(IV) complexes show far greater stability than their iridium analogues. 

Iridium(I) dithiocarbamate complexes have been the subject of a paper by Duckett and co-workers (1451). Reaction of NaS2CNEt2 with [lr(cod)(p-Cl)]2 gives [lr(S2CNEt2)(cod)] from which a range of carbonyl, phosphine, and phosphite complexes are readily prepared via displacement of the diolefin, some of which exhibit luminescence in fluid solution at room temperature. Benzene solutions of [lr(S2CNEt2) P(OPh)3 2] are unstable and result in slow formation of the ortho-metalated iridium(lll) hydride, [IrH(S2CNEt2) P(0Ph)3 P(0Ph)20CeH4 ] (Eq. 140), characterized by a hydride resonance at 8 -16.02. 

Craciunescu et al. (1463,1464) examined the antimmor activity of a range of rhodium and iridium tris(dithiocarbamate) complexes. Iridium complexes showed low activity against various tumors and there was also a correlation between this activity and their trypanosomicidal activity against various trypanosoma species in rats. Rhodium complexes showed similar behavior with [Rh(S2CNHPh)3] being most promising. As a result the nephrotoxic effects of the latter were studied by optical and electron microscopy. 

Among complexes of bidentate ligands, the dithiocarbamate Ir[S2CN(CH2)4]3 has octahedrally coordinated iridium (Ir-S 2.38 A) [153],... 

Iridium(V) complexes, 1158 fluorides, 1158 Iridium(VI) complexes, 1158 Iron complexes acetonitrile, 1210 analysis, 1180, biological systems, 1180 coordination geometries, 1183 coordination numbers, 1182-1187 dinitrosyldicarbonyl, 1188 Mdssbauer spectroscopy, 1181 nitric oxide, 1187-1195 nitrosyls binary, 1188 bis(dithiolene), 1193 carbonyl, 1188 dithiocarbamates, 1192 halides, 1193 iodide, 1193... 

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