Synthesis and characterization of palladium(II) and platinum(II) complexes with ferrocenylimidazole

The synthesis and characterization of ferrocenylimidazole complexes of platinum(II) and palladium(II) are described. Reaction of ferrocenylimidazoles with K2MCl4 (M = Pd, Pt) using a biphasic system of dichloromethane and ethanol/water provided the corresponding complexes 2a–2j in good yields. New synthetic routes for the synthesis of ferrocenylbenzylethers 2k–2o, bis(4-ferrocenylbenzyl)carbonate [2p] and 4-ferrocenylbenzylacetate [2q] are also described. These products were obtained by the reaction of 4-ferrocenylbenzyl-1H-imidazole-carboxylate and K2PtCl4 under various conditions. Compounds 2k–2o were also obtained by alternative routes which do not involve the use of a platinum salt. The crystal structures of 2b, 2q and plausible mechanisms for the formation of 2k, 2p and 2q are reported.

The synthesis and characterization of ferrocenylimidazole complexes of platinum(II) and palladium(II) are described. The reaction of 4-ferrocenylbenzyl-1H-imidazole-1-carboxylate with K2PtCl4 in a water–alcohol mixture afforded ferrocenylbenzylethers. The absence of alcohol led to the formation of the carbonate. The ferrocenylbenzylethers were alternatively obtained by either heating under reflux in a water–alcohol mixture or by acid catalysis at room temperature.Figure optionsDownload as PowerPoint slide