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Synthesis, spectroscopic studies and structural systematics of phosphine oxide complexes with Group II metal (beryllium-barium) nitrates

Davis, M. F., Levason, W., Ratnani, R., Reid, G. and Webster, M. (2006) Synthesis, spectroscopic studies and structural systematics of phosphine oxide complexes with Group II metal (beryllium-barium) nitrates New Journal of Chemistry, 30, (5), pp. 782-790. (doi:10.1039/b600301j).

Record type: Article

Abstract

Complexes of the nitrates of beryllium, magnesium, calcium, strontium and barium with the phosphine oxides OPPh3, Ph2P(O) CH2P(O) Ph-2, and o-C6H4(P(O) Ph-2)(2) have been prepared and characterised by analysis and IR spectroscopy and the structures of [Be(OPPh3)(2)(NO3)(2)], [Mg(OPPh3)(2)(NO3)(2)], [Ca{Ph2P(O) CH2P(O) Ph-2}(2)(NO3)(2)] and [Ca{o-C6H4(P(O) Ph-2)(2)}(2)(NO3)(2)] have been determined. The solution speciation has been probed by a combination of H-1, P-31{H-1} and Be-9 NMR spectroscopy and conductance measurements. The variation in speciation and stability from Be - Ba is interpreted in terms of changes in the charge/radius ratio of the cations - thus whilst Be and Mg interact strongly with the phosphinoyl ligands, strontium and especially barium have very limited affinity for these ligands, and the complexes are extensively dissociated in solution.

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More information

Published date: 2006
Keywords: crystal-structures

Identifiers

Local EPrints ID: 44418
URI: http://eprints.soton.ac.uk/id/eprint/44418
ISSN: 1144-0546
PURE UUID: 49cb4a7b-55e5-4b0c-9524-7fdcbfe1f557
ORCID for W. Levason: ORCID iD orcid.org/0000-0003-3540-0971

Catalogue record

Date deposited: 01 Mar 2007
Last modified: 17 Jul 2017 15:14

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Contributors

Author: M. F. Davis
Author: W. Levason ORCID iD
Author: R. Ratnani
Author: G. Reid
Author: M. Webster

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