Synthesis and spectroscopic properties of Mo(VI) complexes with phosphine oxide ligands and the crystal structures of MoO2X2(OPMe3)(2) (X=Cl or Br) and MoO2Br2{0-C6H4(P(O)Ph-2)(2)}center dot 2CH(2)Cl(2)


Hursthouse, M. B., Levason, W., Ratnani, R. and Red, G. (2004) Synthesis and spectroscopic properties of Mo(VI) complexes with phosphine oxide ligands and the crystal structures of MoO2X2(OPMe3)(2) (X=Cl or Br) and MoO2Br2{0-C6H4(P(O)Ph-2)(2)}center dot 2CH(2)Cl(2). Polyhedron, 23, (11), 1915-1921. (doi:10.1016/j.poly.2004.04.023).

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Description/Abstract

The colourless neutral Mo(VI) complexes [MoO2Cl2(OPMe3)(2)], [MoO2Cl2(L-L)] (L-L = Ph2P(O)CH2P(O)Ph-2, Ph2P(O)CH2CH2P(O)Ph-2 and o-C6H4(P(O)Ph-2)(2)) have been obtained in good yield by reaction of MoO2Cl2 with the ligand in anhydrous CH2Cl2 solution. The corresponding light yellow bromo species were obtained from reaction of a CH2Cl2 solution of the phosphine oxide ligand with MoO3 and HBr. The complexes have been characterised by IR, H-1, P-31{H-1} and where possible by Mo-95 NMR spectroscopy and trends in the spectroscopic data are discussed. Crystal structures of [MoO2X2(OPMe3)(2)] (X = Cl or Br) and [MoO2Br2{o-C6H4(P(O)Ph-2)(2)}] (.) 2CH(2)Cl(2) are also described. Each of the compounds adopts a distorted octahedral geometry at Mo(VI) with trans halo ligands, a cis dioxo unit and with the O-bound phosphine oxide ligands completing the coordination environment.

Item Type: Article
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Keywords: molybdenum, mo-95 nmr, x-ray structures, phosphine oxide nuclear-magnetic-resonance, multinuclear nmr, molybdenum(vi), titanium(iv), 6-coordinate, thioether, halides
Subjects: Q Science
Q Science > QD Chemistry
Divisions: University Structure - Pre August 2011 > School of Chemistry
ePrint ID: 20243
Date Deposited: 16 Feb 2006
Last Modified: 27 Mar 2014 18:09
URI: http://eprints.soton.ac.uk/id/eprint/20243

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