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(dmb) 2 IrCH 3  (dmb = 2.3-dimethylbuta-1.3-diene) reacts with Ph 3 CBF 4  in CH 2 Cl 2  to form the cation [(dmb) 2 Ir] +  which crystallizes as the adduct [(dmb) 2 Ir(OCMe 2 )]BF 4  from acetone solution. The labile acetone ligand is easily displaced by pyridine, cyclohexylisonitrile, phosphane and arsane donor molecules. X-ray diffraction analysis of [(dmb) 2 Ir(AsPh 3 )]BF 4  reveals tetragonal pyramidal coordination at the iridium atom with the arsane ligand in axial position and with isolated BF 4  anions. Spectroscopic data of the new [(dmb) 2 IrL]BF 4  compounds are discussed and related with metal-ligand bond interactions.

zeitschrift für naturforschung b

π-Olefin-Iridium-Komplexe, XV [1] Kationische Bis(2.3-dimethylbutadien)iridium-L-Verbindungen mit verschiedenen Donorliganden L/π-Olefin Iridium Complexes, XV [1] Cationic Bis(2.3-dimethylbutadiene)iridium-L Compounds with Various Donor Ligands L