Abstract
Phenylphosphinic acid (HPhPO 2H) and phenylphosphonic acid (PhPO 3H 2) react with a methanolic solution of [Ru 2(μ-O 2CCH 3) 4(O 2CCH 3) 2]H·0.7H 2O at room temperature to give [Ru 2(μ-O 2CCH 3) 4(HPhPO 2) 2H ( 1) and [Ru 2(μ-O 2CCH 3) 4 (PhPO 3H) 2]H·H 2O ( 2), respectively. The X-ray crystal structures of 1 and 2 each show the RuRu core to be ligated by four bridging bidentate acetate ligands [RuRu distances: 1 = 2.272(1) Å; 2 = 2.267(2) Å] and two axial phenylphosphinate and phenylphosphonate ligands, respectively. In each complex the individual bimetallic molecules are linked together by a hydrogen ion which bridges the oxygen atoms of neighbouring axial ligands. In 2 the water molecule is also hydrogen-bonded to one of the axial phenylphosphonate groups. Spectroscopic, magnetic and cyclic voltammetric data for the complexes are given.
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