2,6-Bis(diphenylphosphinosulfide)pyridine (L) as a facial terdentate ligand: synthesis and characterisation of the tricarbonylrhenium(I) complexes fac-[Re(CO)₃L]⁺ [Re₂(CO)₆(µ-X)₃]⁻ (X = Cl, Br or I) and fac-[Re(CO)₃L]⁺[SbF₆]⁻.
Heard, Peter J and Aliev, A E (1998) 2,6-Bis(diphenylphosphinosulfide)pyridine (L) as a facial terdentate ligand: synthesis and characterisation of the tricarbonylrhenium(I) complexes fac-[Re(CO)₃L]⁺ [Re₂(CO)₆(µ-X)₃]⁻ (X = Cl, Br or I) and fac-[Re(CO)₃L]⁺[SbF₆]⁻.
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Abstract
The halogenopentacarbonylrhenium(I) compounds react with 2,6-bis(diphenylphosphinosulfide) pyridine (L) under mild conditions to yield ionic complexes of general formulae, fac-[Re₂(CO)₃L]⁺ [Re2(CO) ₆(μ-X) )₃]⁻ (X=Cl, Br or I), in which the ligand adopts a facial terdentate bonding mode. A synthesis of [Re(CO)₃L]⁺ [SbF₆]⁻ was carried out to establish the presence of the cation, fac-[Re(CO)₃L]⁺, in the complexes. The character of the anions was confirmed by negative ion MALDI-TOF mass spectrometry. The cation is fluxional; the P–phenyl rings oriented towards the metal moiety exhibit restricted rotation at low temperature. The free energy of activation, ΔG †, for hindered rotation is ca. 47 kJ mol⁻¹ for all complexes. Solid-state₃ ¹P NMR data are reported for the free ligand and for the complexes, [Re(CO)₃L][SbF₆] and [Re(CO)₃L][Re₂(CO)₆(μ-X)₃] (X=Cl, Br or I).
| Item Type: | Article |
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| Additional Information: | Copyright © 1998 Elsevier Science Ltd. All rights reserved. This is the author's final version of the article after peer review. This article was originally published in the Polyhedron Journal in 1998 by Elsevier. The full article can be found at http://dx.doi.org/10.1016/S0277-5387(98)00196-X |
| Keywords: | tricarbonylrhenium(I), solid-state NMR, phosphine ligands |
| Divisions: | ?? GlyndwrUniversity ?? |
| Depositing User: | ULCC Admin |
| Date Deposited: | 05 Oct 2011 09:13 |
| Last Modified: | 11 Dec 2017 20:05 |
| URI: | https://wrexham.repository.guildhe.ac.uk/id/eprint/142 |
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