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Titanium(IV) iodide complexes with phosphine and arsine donor ligands and the crystal structures of the iron(II)/(III) redox pair FeI2{o-C6H4(AsMe2)(2)}(2) (0/+)

Titanium(IV) iodide complexes with phosphine and arsine donor ligands and the crystal structures of the iron(II)/(III) redox pair FeI2{o-C6H4(AsMe2)(2)}(2) (0/+)
Titanium(IV) iodide complexes with phosphine and arsine donor ligands and the crystal structures of the iron(II)/(III) redox pair FeI2{o-C6H4(AsMe2)(2)}(2) (0/+)
Red-brown [TiI4{o-C6H4(PMe2)(2)}] and [TiI4{o-C6H4(AsMe2)(2)}] have been prepared from the ligands and TiI4 in a 1:1 molar ratio in anhydrous CH2Cl2. They have been characterised by analysis, IR, H-1 and P-31{H-1} NMR and UV-Visible spectroscopy as appropriate and have six-coordinate (cis) octahedral geometries. Investigation of the yellow or fawn products from reactions of TiI4 and the ligands in a 1:2 molar ratio, and suggested in the literature to be bis(ligand)-Ti(IV) complexes, have shown that these are mixtures containing iodinated and oxidised ligands, but do not contain Ti(IV)-iodide complexes. The crystal structures of two iron-diarsine complexes [FeI2{o-C6H4(AsMe2)(2)}(2)] and [FeI2{o-C6H4(AsMe2)(2)}(2)]I-3 . 2CH(2)Cl(2) arising from iron iodide impurities in one commercial sample of TiI4 are reported. The complexes constitute a redox pair and the iron(III) complex is the first pseudo-octahedral iron(III) iodide complex to be structurally characterised.
titanium iodide, phosphine, arsine, iron iodide, crystal structures iron(iii) iodide, zirconium, compound, halides, hafnium
0277-5387
605-609
Levason, W.
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Matthews, M. L.
eb956212-fa28-438b-ac18-9f76b38085af
Patel, B.
fb5c89c9-47ce-42d1-8f22-2ab394ffac0d
Reid, G.
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Webster, M.
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7
Levason, W.
e7f6d7c7-643c-49f5-8b57-0ebbe1bb52cd
Matthews, M. L.
eb956212-fa28-438b-ac18-9f76b38085af
Patel, B.
fb5c89c9-47ce-42d1-8f22-2ab394ffac0d
Reid, G.
37d35b11-40ce-48c5-a68e-f6ce04cd4037
Webster, M.
f26c6e36-cb2e-486e-b2ed-b0d25a3a71f7

Levason, W., Matthews, M. L., Patel, B., Reid, G. and Webster, M. (2004) Titanium(IV) iodide complexes with phosphine and arsine donor ligands and the crystal structures of the iron(II)/(III) redox pair FeI2{o-C6H4(AsMe2)(2)}(2) (0/+). Polyhedron, 23 (4), 605-609. (doi:10.1016/j.poly.2003.10.010).

Record type: Article

Abstract

Red-brown [TiI4{o-C6H4(PMe2)(2)}] and [TiI4{o-C6H4(AsMe2)(2)}] have been prepared from the ligands and TiI4 in a 1:1 molar ratio in anhydrous CH2Cl2. They have been characterised by analysis, IR, H-1 and P-31{H-1} NMR and UV-Visible spectroscopy as appropriate and have six-coordinate (cis) octahedral geometries. Investigation of the yellow or fawn products from reactions of TiI4 and the ligands in a 1:2 molar ratio, and suggested in the literature to be bis(ligand)-Ti(IV) complexes, have shown that these are mixtures containing iodinated and oxidised ligands, but do not contain Ti(IV)-iodide complexes. The crystal structures of two iron-diarsine complexes [FeI2{o-C6H4(AsMe2)(2)}(2)] and [FeI2{o-C6H4(AsMe2)(2)}(2)]I-3 . 2CH(2)Cl(2) arising from iron iodide impurities in one commercial sample of TiI4 are reported. The complexes constitute a redox pair and the iron(III) complex is the first pseudo-octahedral iron(III) iodide complex to be structurally characterised.

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More information

Published date: 12 February 2004
Keywords: titanium iodide, phosphine, arsine, iron iodide, crystal structures iron(iii) iodide, zirconium, compound, halides, hafnium

Identifiers

Local EPrints ID: 20270
URI: http://eprints.soton.ac.uk/id/eprint/20270
ISSN: 0277-5387
PURE UUID: 67a013ef-2d6a-4e6f-bcc1-086a311ebeb2
ORCID for W. Levason: ORCID iD orcid.org/0000-0003-3540-0971
ORCID for G. Reid: ORCID iD orcid.org/0000-0001-5349-3468

Catalogue record

Date deposited: 16 Feb 2006
Last modified: 16 Mar 2024 02:43

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Contributors

Author: W. Levason ORCID iD
Author: M. L. Matthews
Author: B. Patel
Author: G. Reid ORCID iD
Author: M. Webster

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