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), 782-790. (doi:10.1039/b600301j).
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Description/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.
| Item Type: | Article |
|---|---|
| ISSNs: | 1144-0546 (print) |
| Related URLs: | |
| Keywords: | crystal-structures |
| Subjects: | Q Science Q Science > QD Chemistry |
| Divisions: | University Structure - Pre August 2011 > School of Chemistry |
| Item ID: | 44418 |
| Date Deposited: | 01 Mar 2007 |
| Last Modified: | 01 Jun 2011 00:09 |
| Contributors: | Davis, M. F. (Author) Levason, W. (Author) Ratnani, R. (Author) Reid, G. (Author) Webster, M. (Author) |
| Date: | 2006 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/44418 |
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