Carboxylatodirhodium(II) complexes with orthometallated tris(p-methoxyphenyl)phosphine and their reactions with pyrazole and imidazole

Exchange reactions of the acetato bridges in [cis-Rh2(μ-OAc)2{μ-(C6H3-4-OMe)P(C6H4-4-OMe)2}2(HOAc)2] give the new complexes: [cis-Rh2(μ-O2CCF3)2{μ-(C6H3-4-OMe)P(C6H4-4-OMe)2}2(HO2CCF3)2] and [cis-Rh2(μ-O2CCH2CH3)2{μ-(C6H3-4-OMe)P(C6H4-4-OMe)2}2(HO2CCH2CH3)2] · HO2CCH2CH3. Molecular structures of these complexes were established spectroscopically and with X-ray methods. Reactions of all complexes with pyrazole and imidazole were investigated spectroscopically. X-ray structures of [cis-Rh2(μ-O2CCF3)2{μ-(C6H3-4-OMe)P(C6H4-4-OMe)2}2(Hpz)2] and [cis-Rh2(μ-O2CCH2CH3)2{μ-(C6H3-4-OMe)P(C6H4-4-OMe)2}2(Hpz)2] have been determined.