Gallium(III) halide complexes with phosphines, arsines and phosphine oxides - a comparative study
Cheng, F., Codgbrook, H.L., Hector, A.L., Levason, W., Reid, G., Webster, M. and Zhang, W. (2007) Gallium(III) halide complexes with phosphines, arsines and phosphine oxides - a comparative study. Polyhedron, 26, (15), 4147-4155. (doi:10.1016/j.poly.2007.05.008).
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Description/Abstract
The phosphine oxide complexes [GaX3(Me3PO)] and [(GaX3)2{μ-o-C6H4(CH2P(O)Ph2)2}] have been prepared and characterised by microanalysis, IR and multinuclear NMR (1H, 13C{1H}, 31P{1H} and 71Ga) spectroscopy. The structures of [GaCl3(Me3PO)], [(GaBr3)2{μ-o-C6H4(CH2P(O)Ph2)2}] and of the ionic product [GaI2(Me3PO)2][GaI4] have been determined and show that the Lewis acidity of the gallium halides towards phosphinoyl ligands diminishes as the halogen becomes heavier. The [GaX3(Ph3E)] (X = Cl, Br or I; E = P or As) and [(GaX3)2{μ-o-C6H4(CH2PPh2)2}] (X = Br or I) have been prepared and their structural and spectroscopic properties compared with those of the phosphinoyl complexes. The results, and competitive solution NMR studies, show that Ga(III) binds the hard R3PO in preference to the softer phosphine or arsine ligands. Hydrolysis of gallium(III) phosphines is shown to lead to [R3PH][GaX4], but in contrast to some other p-block halides, GaX3 do not promote air-oxidation of R3P to R3PO.
| Item Type: | Article |
|---|---|
| ISSNs: | 0277-5387 (print) |
| Related URLs: | |
| Keywords: | gallium, diphosphine, thio-ether, adducts, structural-characterization, phosphonium, crystal-structures, magnetic-resonance, antimony(iii), phosphine oxide, seleno-ether ligands, nmr spectroscopy, tin(iv) halides, coordination complexes, phosphine |
| Subjects: | Q Science Q Science > QD Chemistry |
| Divisions: | University Structure - Pre August 2011 > School of Chemistry |
| Item ID: | 54262 |
| Date Deposited: | 30 Jul 2008 |
| Last Modified: | 01 Jun 2011 02:36 |
| Contributors: | Cheng, F. (Author) Codgbrook, H.L. (Author) Hector, A.L. (Author) Levason, W. (Author) Reid, G. (Author) Webster, M. (Author) Zhang, W. (Author) |
| Date: | 2007 |
| Status: | Published |
| Contact Email Address: | gr@soton.ac.uk |
| URI: | http://eprints.soton.ac.uk/id/eprint/54262 |
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