Abstract
The reactions between lanthanide nitrates and (MeO) 2P(:O)C(:O)Ph in methanol have been studied. The products of the reaction are (MeO) 2P(:O)H, [(MeO) 2P(:O)] 2 C(OH)Ph and PhC(:O)OMe. At high concentrations of reactants the complexes Ln(NO 3) 3 {[(Me) 2P(:O)] 2C(OH)Ph} 2 are formed (Ln = La, Ce) whilst loss of nitrate occurs for the heavier metals giving Ln(PO 4){MeO) 2P(:O)H} 2 · H 2O (Ln = Yb). The kinetics of the reaction in dilute solution have been studied and a mechanism proposed. Derivation of a rate equation from the full mechanism is not possible but the kinetics data have been fitted to an approximate expression and the results compared with first order analysis. Supporting evidence for the proposed mechanism (mainly 31P NMR spectroscopy) is also presented.
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