Abstract
Exchange reactions of the acetato bridges in [ cis-Rh 2(μ-OAc) 2{μ-(C 6H 3-4-OMe)P(C 6H 4-4-OMe) 2} 2(HOAc) 2] ([ 1(HOAc) 2]) for trifluoroacetato and propionato bridges give new dirhodium(II) complexes with two orthometallated molecules of tris( p-methoxyphenyl)phosphine (PMP): [ cis-Rh 2(μ-O 2CCF 3) 2{μ-(C 6H 3-4-OMe)P(C 6H 4-4-OMe) 2} 2(HO 2CCF 3) 2] ([ 2(HO 2CCF 3) 2]) and [ cis-Rh 2(μ-O 2CCH 2CH 3) 2{μ-(C 6H 3-4-OMe)P(C 6H 4-4-OMe) 2} 2(HO 2CCH 2CH 3) 2] · HO 2CCH 2CH 3 ([ 3(HO 2CEt) 2] · HO 2CEt), respectively. X-ray structures of the complexes [ 2(H 2O)(PrOH)] · PrOH and [ 3(HO 2CEt) 2] · HO 2CEt, as well as of pyrazole adducts [ 2(C 3H 4N 2) 2] and [ 3(C 3H 4N 2) 2] have been determined. The Rh–Rh distances in [ 2(C 3H 4N 2) 2] and [ 3(C 3H 4N 2) 2] are a little longer than those in [ 2(H 2O)(PrOH)] · PrOH and [ 3(HO 2CEt) 2] · HO 2CEt. Reactions of all these complexes with pyrazole and imidazole were investigated using UV–Vis spectroscopy. It has been found that pyrazole molecules are coordinated to [ 1], [ 2] and [ 3] complexes more strongly than imidazole. Reactions with pyrazole were also studied using NMR spectroscopy.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call