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Complexes of lanthanide nitrates with tri-isopropylphosphine oxide

Complexes of lanthanide nitrates with tri-isopropylphosphine oxide
Complexes of lanthanide nitrates with tri-isopropylphosphine oxide
The complexes formed on reaction of tri-isopropylphosphine oxide ((C3H7)(3)PO = (Pr3PO)-Pr-i = L) and lanthanide nitrates have been studied. The new compounds have been characterised by elemental analysis, infrared and P-31 NMR spectroscopy in CD2Cl2 solution. On reaction of lanthanide nitrates and L in 1:3 ratios, well defined Ln(NO3)(3)L-3 are obtained for Ln = La-Eu with complexes for the heavier lanthanides forming mixtures of Ln(NO3)(3)L-3 and Ln(NO3)(3)L-2. Analytically pure complexes Ln(NO3)(3)L-2 can be isolated for Yb and Lu. Single crystal X-ray structures for Ln(NO3)(3)L-3, Ln = La (1), Ce (2), Pr (3), the ionic complex [Er(NO3)(2)L-3(H2O)][NO3] (4) and Ln(NO3)(3)L-2, Ln = Yb (5), Lu (6) are reported. The P-31 solution NMR spectra of Ln(NO3)(3)L-3 show that the complexes are fluxional at ambient temperature with spectra consistent with static structures observed at lower temperatures for some complexes. The structures and solution properties are discussed in terms of the steric and electronic properties of the ligand.
0277-5387
258-264
Bowden, Allen
56c1b364-6752-494e-97fa-ea2d8b161124
Coles, Simon J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Pitak, Mateusz B.
eeb6a00f-2291-4376-830f-d30dfd607ed1
Platt, Andrew W.G.
5c37ba32-808b-4cfd-beab-f42c8c806a61
Bowden, Allen
56c1b364-6752-494e-97fa-ea2d8b161124
Coles, Simon J.
3116f58b-c30c-48cf-bdd5-397d1c1fecf8
Pitak, Mateusz B.
eeb6a00f-2291-4376-830f-d30dfd607ed1
Platt, Andrew W.G.
5c37ba32-808b-4cfd-beab-f42c8c806a61

Bowden, Allen, Coles, Simon J., Pitak, Mateusz B. and Platt, Andrew W.G. (2014) Complexes of lanthanide nitrates with tri-isopropylphosphine oxide. Polyhedron, 68, 258-264. (doi:10.1016/j.poly.2013.10.028).

Record type: Article

Abstract

The complexes formed on reaction of tri-isopropylphosphine oxide ((C3H7)(3)PO = (Pr3PO)-Pr-i = L) and lanthanide nitrates have been studied. The new compounds have been characterised by elemental analysis, infrared and P-31 NMR spectroscopy in CD2Cl2 solution. On reaction of lanthanide nitrates and L in 1:3 ratios, well defined Ln(NO3)(3)L-3 are obtained for Ln = La-Eu with complexes for the heavier lanthanides forming mixtures of Ln(NO3)(3)L-3 and Ln(NO3)(3)L-2. Analytically pure complexes Ln(NO3)(3)L-2 can be isolated for Yb and Lu. Single crystal X-ray structures for Ln(NO3)(3)L-3, Ln = La (1), Ce (2), Pr (3), the ionic complex [Er(NO3)(2)L-3(H2O)][NO3] (4) and Ln(NO3)(3)L-2, Ln = Yb (5), Lu (6) are reported. The P-31 solution NMR spectra of Ln(NO3)(3)L-3 show that the complexes are fluxional at ambient temperature with spectra consistent with static structures observed at lower temperatures for some complexes. The structures and solution properties are discussed in terms of the steric and electronic properties of the ligand.

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More information

Published date: 28 January 2014
Organisations: Organic Chemistry: Synthesis, Catalysis and Flow, Chemistry, Faculty of Natural and Environmental Sciences

Identifiers

Local EPrints ID: 369223
URI: http://eprints.soton.ac.uk/id/eprint/369223
ISSN: 0277-5387
PURE UUID: 0f1b9402-47ab-4261-ac04-815f9d179cd2
ORCID for Simon J. Coles: ORCID iD orcid.org/0000-0001-8414-9272
ORCID for Mateusz B. Pitak: ORCID iD orcid.org/0000-0002-3680-7100

Catalogue record

Date deposited: 30 Sep 2014 11:22
Last modified: 15 Sep 2021 01:43

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