Nitrosyl complexes iridium

Figure 2.100 Synthesis of some iridium nitrosyl complexes.

Table 2.14 Structural data for iridium nitrosyl complexes...

Figure 2.102 Addition reactions for iridium nitrosyl complexes (i (N-O) (cm ) is shown for...

Later related reactions of iridium nitrosyl complexes of a slightly different type were reported (equations 40-42). 

Several iridium( —I) nitrosyl complexes are known. Those with the general formula [Ir(NO)2X(PPh3)2] (X = Cl, Br, I) are produced upon reduction of [Ir(NO)2(PPh3)2] with the appropriate lithium halide. IR spectral data for these complexes indicate bridging NO groups, as shown by the low N—O frequencies [v(N—O) 1540-1490 cm-1].7 Reaction of [Ir(NO)2X(PPh3)2] with NO results in the oxidation of NO according to reaction (l).8... 

Thus, while numerous carbonyl complexes have been prepared, TpRh(CO)2 remains unknown due to its apparent propensity to convert to Tp2Rh2(00)3, despite the stability of less sterically encumbered analogues. More surprisingly, the only example of a nitrosyl complex is Tp Co(NO), whilst more conventional iridium or rhodium examples remain unknown. 

Ruthenium(III), d, is ruthenium s most stable oxidation state and resembles rhodium(III) and iridium(III) more than osmium(III). The salts inelude the halides, hydroxides, and oxides RuCls SHaO is most important because it is a good starting material for other compounds and reacts readily with olefins and phosphines. Complexes of this oxidation state are known with water, eyanide, oxygenated organies, sueh as diketones and earboxylates, pyridines, earbonyls, ey-elopentadienyls, phosphine, and arsine ligands. A notable differenee between ruthenium(II) and ruthenium(III) is the absenee of ruthenium(III) nitrosyl complexes. 

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