Trimethylplatinum(IV) complexes of dithiocarbamato ligands: an experimental NMR study on the barrier to C–N bond rotation

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J.-Chem.-Soc.-Dalton-Trans.-2000-1349–1356-1 Download

Author(s): Heard Peter J. | Kite Kenneth | Nielsen Julie Sogaard | Tocher Derek A.

Type of publication: Journal paper

Abstract: Reaction of pentane-2,4-dione, pyridine-2-carboxylic acid or pyridine-2,6-dicarboxylic acid with trimethylplatinum(IV) gives dimeric complexes of general formulae fac-[PtMe3L]2, in which the ionised ligand acts in a chelating and a bridging fashion. High-resolution solid-state 19;Pt NMR data shows that the two platinum atoms are equivalent ; the chemical shielding anisotropy and the principal components of the shielding tensor are reported. The complexes are soluble in co-ordinating solvents, yielding monomeric species of general formulae fac-[PtMe3L(solvent)], which are fluxional. The pyridine adducts, fac-[PtMe3L(py)] (L = pentane-2,4-dionato or pyridine-2-carboxylato), are also stereochemically non-rigid. The energetics of the dynamic processes have been studied by standard 1H NMR band shape analysis techniques ; ΔG ‡ (298 K) is in the range 69–86 kJ mol−1. Solid-state 13C, and solution-state 13C and 19;Pt NMR data are also reported.

Published URL: https://pubs.rsc.org/en/content/articlelanding/2000/dt/b000264j

Date Published: March 8 2000

Publication title: Journal of the Chemical Society | Dalton Transactions

Publisher: Elsevier

Place of publication: London

Pages: 1349-1356

Subject(s): Chemistry

DOI: https://doi.org/10.1016/S0277-5387(98)00007-2