Complexes of the lanthanide metals (La–Nd, Sm–Lu) with hypophosphite and phosphite ligands: crystal structures of [Ce(H2PO2)3(H2O)], [Dy(H2PO2)3] and [Pr(H2PO2)(HPO3)(H2O)]·H2O

Autor:	Andrew Jackson, Joanne A. Seddon, Roman A. Kresinski, Andrew W.G. Platt
Rok vydání:	1999
Předmět:	Lanthanide Steric effects chemistry.chemical_compound Crystallography Aqueous solution Chemistry Hypophosphite Inorganic chemistry Molecule General Chemistry Crystal structure
Zdroj:	Journal of the Chemical Society, Dalton Transactions. :2189-2196
ISSN:	1364-5447 0300-9246
DOI:	10.1039/a807727d
Popis:	Reactions of lanthanide chlorides LnCl3 with NaH2PO2 in aqueous solution afforded a series of complexes [Ln(H2PO2)3(H2O)n] (Ln = La–Tb, n = 1; Ce–Nd, Dy–Lu; n = 0) with members falling into at least four separate structural types. The crystal structures of members of two of these types, [Ce(H2PO2)3(H2O)] and [Dy(H2PO2)3], have been determined for the first time, along with that of [Pr(H2PO2)(HPO3)(H2O)]·H2O, one of a new series of complexes [Ln(H2PO2)(HPO3)(H2O)n]·nH2O (Ln = La–Gd, n = 1; Tb–Lu; n = 0) obtained by controlled oxidation of [Ln(H2PO2)3(H2O)n]. The hydrated members of this series are notable due to their incorporation of chiral channels inhabited by water molecules, and to their ability reversibly to dehydrate. Steric angle sum calculations have been used to rationalise the morphologies of the new complexes.
Databáze:	OpenAIRE
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