Synthesis and characterisation of W-VI complexes of phosphane oxide ligands, [WO2X2(OPR3)(2)] (X = F, Cl or Br; R = Me or Ph), and of the [MoO2F2(OPR3)(2)]
Davis, M.F., Levason, W., Ratnani, R., Reid, G., Rose, T. and Webster, M. (2007) Synthesis and characterisation of W-VI complexes of phosphane oxide ligands, [WO2X2(OPR3)(2)] (X = F, Cl or Br; R = Me or Ph), and of the [MoO2F2(OPR3)(2)]. European Journal of Inorganic Chemistry, (2), 306-313. (doi:10.1002/ejic.200600823).
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Description/Abstract
Phosphane oxide complexes of dioxidotungstenVI, [WO2X2(OPR3)2] (X = Cl or Br, M = Ph or Me) have been prepared under anhydrous conditions from the reaction of WX6 with (Me3Si)2O in CH2Cl2, followed by addition of OPR3. Some diphosphane dioxide analogues have been made similarly, viz, [WO2X2(L-L)] {L-L = Ph2P(O)(CH2)nP(O)Ph2 (n = 1 or 2), o-C6H4[P(O)Ph2]2}. The complexes have been characterised by elemental analysis, IR and NMR (1H and 31P{1H}) spectroscopy, and the structures of [WO2Br2(OPPh3)2] and [WO2Cl2(OPMe3)2] determined, revealing distorted six-coordinate tungsten centres with cis-WO2 and trans-WX2 units. The difluorido-dioxido complexes [MO2F2(OPR3)2] (M = Mo or W) and [WO2F2(L-L)] (L-L = 2,2-bipyridyl, 1,10-phenanthroline) have been prepared by fluorination of the corresponding chlorido complexes with Me3SnF in CH2Cl2. These are characterised similarly and by 19F{1H} NMR spectroscopy. Attempts to make [MO2I2(OPR3)2] were unsuccessful. No adduct formation occurs between CrO2Cl2 and OPPh3 under rigorously anhydrous conditions. Crystal structures of [Me3SnCl(OPPh3)] and two forms of [WO2Cl2(1,10-phen)] are also reported and discussed.
| Item Type: | Article |
|---|---|
| ISSNs: | 1434-1948 (print) |
| Related URLs: | |
| Keywords: | tin(iv) fluoride complexes, halides, molybdenum, crystal-structures, donor ligands, chloride, molybdenum(vi), coordination chemistry, chromium-(vi), , dioxodichloride, phosphane oxide, tungsten,tungsten, adducts, crystal structures, fluoride |
| Subjects: | Q Science Q Science > QD Chemistry |
| Divisions: | University Structure - Pre August 2011 > School of Chemistry |
| Item ID: | 54280 |
| Date Deposited: | 31 Jul 2008 |
| Last Modified: | 01 Jun 2011 02:34 |
| Contributors: | Davis, M.F. (Author) Levason, W. (Author) Ratnani, R. (Author) Reid, G. (Author) Rose, T. (Author) Webster, M. (Author) |
| Date: | 2007 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/54280 |
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