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Synthesis and characterisation of tin(IV) fluoride complexes of phosphine and arsine oxide ligands

Synthesis and characterisation of tin(IV) fluoride complexes of phosphine and arsine oxide ligands
Synthesis and characterisation of tin(IV) fluoride complexes of phosphine and arsine oxide ligands
The pseudooctahedral complexes [SnF4L2] (L = Ph3PO, Ph3AsO, Me3PO, Me3AsO) and [SnF4(L-L)] (L-L = Ph2P(O)CH2P(O)Ph-2, o-C6H4(P(O)Me-2)(2), o-C6H4(P(O)Ph-2)(2)) have been prepared from [SnF4(MeCN)(2)] and the appropriate ligand in dichloromethane solution. The complexes have been characterised by analysis, IR, H-1, P-31{H-1}, F-19{H-1} and Sn-119 NMR spectroscopy as appropriate; the NMR studies showing that the complexes of the monodentate ligands exist as mixtures of trans and cis isomers in solution. The crystal structures of trans-[SnF4(OPMe3)(2)], [SnF4{o-C6H4(P(O)Ph-2)(2)}] center dot CH2Cl2 center dot H2O and [o-C6H4(P(O)Ph-2)(2)] center dot CH2Cl2 have been determined. Comparison of the structural and NMR spectroscopic data of the tetrafluorotin complexes with those of related [SnX4L2] (X = Cl, Br or 1) shows that SnF4 is the strongest Lewis acid in the series towards hard Lewis bases.
tin(iv) fluoride, phosphine oxide, arsine oxide nuclear-magnetic-resonance, cis-trans isomerism, neutral lewis-bases, crystal-structures, multinuclear nmr, trimethylphosphine oxide, infrared spectra, halide-complexes, adducts, tetrahalides
0277-5387
930-936
Davis, Martin F.
72f26f03-4bbe-482e-b8a5-6c792b22fcc3
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Webster, Michael
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7
Davis, Martin F.
72f26f03-4bbe-482e-b8a5-6c792b22fcc3
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Webster, Michael
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7

Davis, Martin F., Levason, William, Reid, Gillian and Webster, Michael (2006) Synthesis and characterisation of tin(IV) fluoride complexes of phosphine and arsine oxide ligands. Polyhedron, 25 (4), 930-936. (doi:10.1016/j.poly.2005.10.024).

Record type: Article

Abstract

The pseudooctahedral complexes [SnF4L2] (L = Ph3PO, Ph3AsO, Me3PO, Me3AsO) and [SnF4(L-L)] (L-L = Ph2P(O)CH2P(O)Ph-2, o-C6H4(P(O)Me-2)(2), o-C6H4(P(O)Ph-2)(2)) have been prepared from [SnF4(MeCN)(2)] and the appropriate ligand in dichloromethane solution. The complexes have been characterised by analysis, IR, H-1, P-31{H-1}, F-19{H-1} and Sn-119 NMR spectroscopy as appropriate; the NMR studies showing that the complexes of the monodentate ligands exist as mixtures of trans and cis isomers in solution. The crystal structures of trans-[SnF4(OPMe3)(2)], [SnF4{o-C6H4(P(O)Ph-2)(2)}] center dot CH2Cl2 center dot H2O and [o-C6H4(P(O)Ph-2)(2)] center dot CH2Cl2 have been determined. Comparison of the structural and NMR spectroscopic data of the tetrafluorotin complexes with those of related [SnX4L2] (X = Cl, Br or 1) shows that SnF4 is the strongest Lewis acid in the series towards hard Lewis bases.

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Published date: 2006
Keywords: tin(iv) fluoride, phosphine oxide, arsine oxide nuclear-magnetic-resonance, cis-trans isomerism, neutral lewis-bases, crystal-structures, multinuclear nmr, trimethylphosphine oxide, infrared spectra, halide-complexes, adducts, tetrahalides

Identifiers

Local EPrints ID: 44419
URI: http://eprints.soton.ac.uk/id/eprint/44419
ISSN: 0277-5387
PURE UUID: 9baaf032-a0ed-4b1a-83dc-9b10955dd024
ORCID for William Levason: ORCID iD orcid.org/0000-0003-3540-0971
ORCID for Gillian Reid: ORCID iD orcid.org/0000-0001-5349-3468

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Date deposited: 01 Mar 2007
Last modified: 10 Dec 2019 01:59

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Contributors

Author: Martin F. Davis
Author: William Levason ORCID iD
Author: Gillian Reid ORCID iD
Author: Michael Webster

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