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]−

Author(s): Peter J. Heard | Abil Aliev.

Type of publication: Journal paper

Abstract: The halogenopentacarbonylrhenium(I) compounds react with 2,6-bis(diphenylphosphinosulfide) pyridine (L) under mild conditions to yield ionic complexes of general formulae, fac-[Re(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-state 31P 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).

Published URL: https://www.sciencedirect.com/science/article/pii/S027753879800196X

Date Published: March 17 1999

Publication title: Polyhedron

Publisher: Elsevier

Place of publication: London (United Kingdom)

Pages: 3981-3987

Subject(s): Chemistry

DOI: https://doi.org/10.1016/S0277-5387(98)00196-X

Keywords: tricarbonylrhenium(I) solid-state NMRphosphine ligands

Depositing User: Luke Miller