A dynamic NMR study of 1,2-metallotropic shifts in trimethylplatinum(IV) halide complexes of 3-methylpyridazine.

Abel, Edward W, Heard, Peter J, Orrell, Keith G and Sik, Vladima (1994) A dynamic NMR study of 1,2-metallotropic shifts in trimethylplatinum(IV) halide complexes of 3-methylpyridazine.

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Abstract

3-Methylpyridazine (3-Mepydz) reacts with halogenotrimethylplatinum(IV), [PtXMe₃)₄], to afford complexes of type fac-[PtXMe₃(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 ismers are strongly influenced by the steric effects of the 3-methyl group on the pyridazine ring, with the (1,1)-isomer always being predominant (≈ 95%). Activation energies for the fluxion 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.

Item Type: Article
Additional Information: Copyright © 1994 Published by Elsevier Science Ltd. All rights reserved. Only Metadata is available from this website. This article was originally published in the Polyhedron Journal by Elsevier in 1994. The full article can be found at http://dx.doi.org/10.1016/S0277-5387(00)86624-3
Keywords: Dynamic NMR, metallotropic shift, trimethylplatinum(IV), pyridazine, complexes
Divisions: ?? GlyndwrUniversity ??
Depositing User: ULCC Admin
Date Deposited: 05 Oct 2011 09:13
Last Modified: 11 Dec 2017 20:05
URI: http://glyndwr.repository.guildhe.ac.uk/id/eprint/144

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