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Preparation and structures of tellurium(iv) halide complexes with thioether coordination

Preparation and structures of tellurium(iv) halide complexes with thioether coordination
Preparation and structures of tellurium(iv) halide complexes with thioether coordination
The first chalcogenoether complexes of Te(iv) chloride and bromide are prepared by reaction of the thioether with a suspension of TeX(4) in anhydrous CH(2)Cl(2), and the products characterised by IR, Raman, (1)H and (125)Te{(1)H} NMR spectroscopy and microanalysis. The structures of the distorted octahedral chelate complexes [TeX(4){RS(CH(2))(2)SR}] (X = Cl or Br; R = Me or (i)Pr) and the centrosymmetric halo-bridged dimers [{X(3)(Me(2)S)Te}(2)(micro-X)(2)] (X = Cl or Br) involving Te(iv) are reported and the structures interpreted in terms of a three-centre-four-electron bonding model, with weak, secondary Te-S interactions. The structure of a unique Te(ii) thioether complex, [TeCl{(i)PrS(CH(2))(2)S(i)Pr}][Te(2)Cl(9)] obtained as a decomposition product from a sample of [TeCl(4){(i)PrS(CH(2))(2)S(i)Pr}], in which a Te(ii) thioether cation and Te(iv) chloride anion are weakly associated via micro(2)- and micro(3)-bridging Cl ligands, is also described. In this case distortions in the coordination environment at the Te(ii) ion are attributed to the effects of the Te-based lone pairs.

1477-9226
4122-4128
Gurnani, Chitra
18063024-d052-4fe3-8a79-fdecd227bc2c
Jura, Marek
e4a8ae2b-5609-45bb-99d8-a2320b9c89b9
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Ratnani, Raju
0a86c56f-00c6-4c9f-8aa0-52667938ba70
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Webster, Michael
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7
Gurnani, Chitra
18063024-d052-4fe3-8a79-fdecd227bc2c
Jura, Marek
e4a8ae2b-5609-45bb-99d8-a2320b9c89b9
Levason, William
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Ratnani, Raju
0a86c56f-00c6-4c9f-8aa0-52667938ba70
Reid, Gillian
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Webster, Michael
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7

Gurnani, Chitra, Jura, Marek, Levason, William, Ratnani, Raju, Reid, Gillian and Webster, Michael (2009) Preparation and structures of tellurium(iv) halide complexes with thioether coordination. Dalton Transactions, (21), 4122-4128. (doi:10.1039/b902771h).

Record type: Article

Abstract

The first chalcogenoether complexes of Te(iv) chloride and bromide are prepared by reaction of the thioether with a suspension of TeX(4) in anhydrous CH(2)Cl(2), and the products characterised by IR, Raman, (1)H and (125)Te{(1)H} NMR spectroscopy and microanalysis. The structures of the distorted octahedral chelate complexes [TeX(4){RS(CH(2))(2)SR}] (X = Cl or Br; R = Me or (i)Pr) and the centrosymmetric halo-bridged dimers [{X(3)(Me(2)S)Te}(2)(micro-X)(2)] (X = Cl or Br) involving Te(iv) are reported and the structures interpreted in terms of a three-centre-four-electron bonding model, with weak, secondary Te-S interactions. The structure of a unique Te(ii) thioether complex, [TeCl{(i)PrS(CH(2))(2)S(i)Pr}][Te(2)Cl(9)] obtained as a decomposition product from a sample of [TeCl(4){(i)PrS(CH(2))(2)S(i)Pr}], in which a Te(ii) thioether cation and Te(iv) chloride anion are weakly associated via micro(2)- and micro(3)-bridging Cl ligands, is also described. In this case distortions in the coordination environment at the Te(ii) ion are attributed to the effects of the Te-based lone pairs.

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Published date: 7 June 2009

Identifiers

Local EPrints ID: 146945
URI: http://eprints.soton.ac.uk/id/eprint/146945
ISSN: 1477-9226
PURE UUID: 2177428e-4b1d-4065-8800-ce1c225dad51
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: 22 Apr 2010 15:41
Last modified: 20 Jul 2019 01:28

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