Iridium complexes with isocyanides

Lithium or potassium indenyl has been used to generate both iridium complexes and isocyanide rhodium complexes of the form (n indenyl)Rh(CNR)2. Bimetallic complexes of Co,Rh and Ir have been made using thallium fulvanate Tl2(CioH8)- With the linked permethylcyclopentadienyl lithium reagent dirhodium complexes such as (19) can be made. ... 

Bis[iV,iV -di(2-pyridyl)-imidazol-2-ylidene]aurate(I) tetrafluoroborates, preparation, 2, 292-293 Bis[iV,iV -di(2-pyridyl-methyl)-imidazol-2-ylidene]aurate(I) tetrafluoroborates, preparation, 2, 292-293 Bis(diselenolate) complexes, dinuclear iron compounds, 6, 242 Bis(dithiolene) compounds, in tungsten carbonyl and isocyanide complexes, 5, 644 Bis(enolato) complexes, with bis-Cp Ti(IV), 4, 589 Bis(enones), in reductive cyclizations, 10, 502 Bis(ethanethiolato) complexes, with bis-Cp Ti(IV), 4, 601 Bis(ethene)iridium complexes, preparation, 7, 328-329 -Bis(fluorenyl)zirconocene dichlorides, preparation,... 

The most interesting work on the isocyanide complexes of the elements in this subgroup has been done with rhodium and iridium. For the most part, the work is involved with the oxidative addition reactions of d square-planar metal complexes. 

Several examples of transition metal-catalyzed insertions of carbon monoxide and isocyanide into the C-H bond are known. The carbonylation of a C-H bond to an aldehyde requires photoirradiation conditions. Eisenberg et al. have found iridium-[45,46] or rhodium-catalyzed [47] photocarbonylation of benzene affording benzaldehyde, albeit with low efficiency [45-47]. They have also reported the photochemical carbonylation of benzene catalyzed by ruthenium(O) complexes [48]. 

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