A Dynamic NMR Study of 1,2-Metallotropic Shifts in Trimethylplatinum(IV) Halide Complexes of 3-Methylpyridazine.

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Polyhedron-1994-1320-2907-2913Download

Author(s): Abel Edward W. | Heard Peter J. | Orrell Keith G. | Sik Vladimir

Type of publication: Journal paper

Abstract: 3-Methylpyridazine (3-Mepydz) reacts with halogenotrimethylplatinum(IV), [(PtXMe₃)₄], to afford complexes of type fac-[PtXMe₃9(3-Mepydz)₂] (X = Cl, Br or I). In solution these complexes undergo 1,2-metallotropic shifts between the contiguous nitrogen donors producing different linkage isomers. Solution abundances of these isomers are strongly influenced by steric effects of the 3-methyl group on the pyridazine ring, with the (1,2)-isomer always being predominant (~95%). Activatioin energies of the fluzion were determined by variable temperature ¹H NMR spectroscopy, values of the (1,1) → (1,2) isomer shift being in the range 74-78 kJ mol⁻¹.

Published URL: https://www.sciencedirect.com/science/article/abs/pii/S0277538700866243?via%3Dihub

Date Published: April 8 1994

Publication title: Polyhedron

Publisher: Elsevier Science

Place of publication: Great Britain

Pages: 2907-2913

Subject(s): Chemistry

DOI: https://doi.org/10.1016/S0277-5387(00)86624-3

Keywords: 1 | 2-Metallotropic Shifts | Trimethylplatinum(IV) | 3-Methylpyridazine | Halide Complexes

Depositing User: Hasnah Patel