The compounds [Rh2(μ-OAc)4(terpy)2] (1) and [Rh2Cl2(μ-OAc)(terpy)2](H3O)Cl2·9H2O (2) have been synthesized in reactions of [Rh2(μ-OAc)4(H2O)2] with 2,2‘:6‘,2‘‘-terpyridine (terpy) (compound 1) and with terpy and NaCl (compound 2) in ethanol using stoichiometric quantities of reactants. Both compounds were structurally and spectroscopically characterized. In 1 terpyridine acts as a monodentate ligand. The compound 2 is the first Rh(II) complex containing only one carboxylato bridging ligand to be analyzed crystallographically. The Rh−Rh distance in 1 is considerably shorter than in 2. The complex 2 in basic solutions in alcohols is an efficient catalyst for reduction of ketones.
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Pruchnik et al. (1996) studied this question.
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