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New Journal of Chemistry

Mononuclear and dinuclear trimethylplatinum(IV) iodide complexes of 3-substituted pyridines

Authors: Biswa Nath Ghosh; Sabine Schlecht; Antonio Bauza; Antonio Frontera

Publication Date: -0001-11-30  Article ASAP

Reaction of tetrameric trimethylplatinum(IV) iodide with excess of 3-substituted pyridines in chloroform afforded mononuclear complexes, [PtMe3L2I] (L = 3-CNpy, 3-Brpy, 3-MeOpy, 3-Mepy and 3-Etpy). The complexes have been characterized by 1H NMR, CHN analysis and X-ray single crystal structure analysis. The mononuclear complexes undergo reaction with trimethylplatinum(IV) iodide in chloroform to form corresponding dinuclear forms (both syn and anti). A comparison of both the mononuclear and dinuclear forms in solution for a particular pyridine substituent have been studied in detail with the help of 1H NMR spectroscopy, ably supported by DFT computational studies. The investigation further shows the influence of the pyridine substituent on controlling the mode of the reaction. The crystal structures of two dinuclear complexes, syn-[PtMe3(3-CNpy)I]2 and anti-[PtMe3(3-Brpy)I]2, have also been described here.  Read more