American Chemical Society
ic051617q_si_003.cif (19.52 kB)

Synthesis and Structural Characterization of M(PMe3)3(O2CR)2(OH2)H2 (M = Mo, W):  Aqua−Hydride Complexes of Molybdenum and Tungsten

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posted on 2005-12-26, 00:00 authored by Guang Zhu, Gerard Parkin
Mo(PMe3)6 and W(PMe3)42-CH2PMe2)H undergo oxidative addition of the O−H bond of RCO2H to yield sequentially M(PMe3)42-O2CR)H and M(PMe3)32-O2CR)(η1-O2CR)H2 (M = Mo and R = Ph, But; M = W and R = But). One of the oxygen donors of the bidentate carboxylate ligand may be displaced by H2O to give rare examples of aqua−dihydride complexes, M(PMe3)31-O2CR)2(OH2)H2, in which the coordinated water molecule is hydrogen-bonded to both carboxylate ligands.