Issue 5, 2006
From the journal:

New Journal of Chemistry

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

Martin F. Davis,a   William Levason,*a   Raju Ratnani,*b   Gillian Reid*a  and  Michael Webstera  

* Corresponding authors

a School of Chemistry, University of Southampton, Southampton, UK

b Department of Pure and Applied Chemistry, M. D. S. University, Ajmer, India

Abstract

Complexes of the nitrates of beryllium, magnesium, calcium, strontium and barium with the phosphine oxides OPPh3, Ph2P(O)CH2P(O)Ph2, and o-C6H4(P(O)Ph2)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)Ph2}2(NO3)2] and [Ca{o-C6H4(P(O)Ph2)2}2(NO3)2] have been determined. The solution speciation has been probed by a combination of 1H, 31P{1H} and 9Be 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.

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

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Article information

DOI
https://doi.org/10.1039/B600301J
Article type
Paper
Submitted
10 Jan 2006
Accepted
23 Feb 2006
First published
21 Mar 2006

New J. Chem., 2006,30, 782-790

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

M. F. Davis, W. Levason, R. Ratnani, G. Reid and M. Webster, New J. Chem., 2006, 30, 782 DOI: 10.1039/B600301J

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