New diruthenium complexes formed via modification with 1,1′-ferrocene dicarboxylic acid

Carboxylate exchange reactions between Ru(2)(DArF)(3)(OAc) Cl (1) and 1,1'-ferrocene dicarboxylic acid resulted in the new compounds [Ru(2)(DArF)(3)Cl](2)(mu-1,1'-(O(2)CFcCO(2)) (3), where DArF is either N, N'-di(3,5-dichlorophenyl) formamidinate (D(3,5-Cl(2)Ph) F, a), or N, N'-di(3-methoxyphenyl) formamidinate (DmAniF, b). The exchange reactions between Ru(2)(DArF)(2)(OAc)(2)Cl (2) and 1,1'-ferrocene dicarboxylic acid yielded the new compounds Ru(2)(DArF)(2)(O(2)CFcCO(2))Cl (4a and 4b). The dimeric nature of compounds 3 was confirmed by both the MS data and an X-ray structural study of 3b. The monomeric nature of compounds 4a and 4b was confirmed by the MALDI-TOF MS data. Both compounds 3 and 4 were also characterized with cyclic (CV) and differential pulse voltammetry (DPV) and room temperature magnetic susceptibility measurements. (C) 2011 Elsevier B.V. All rights reserved.