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Reactions of carbon monoxide with Fe(II) diethyldithiocarbamate and Fe(II) ethylxanthate

1984; Elsevier BV; Volume: 83; Issue: 2 Linguagem: Inglês

10.1016/s0020-1693(00)82517-7

1873-3255

M.R. Houchin,

Enzyme function and inhibition

Reactions of carbon monoxide with iron(II) diethyldithiocarbamate and iron(II) ethylxanthate were followed using solution IR spectroscopy. In DMF and CH3CN solutions, the only Fe—dithiocarbamate—carbon monoxide complex observed was cis-[Fe(CO)2(dedtc)2]. This complex formed rapidly and appeared to be very stable, resisting displacement of the coordinated CO molecules by other ligands. Fe(exa)2 showed very little coordination of CO in DMF solution, but in CH3CN solution formed the complex cis-[Fe(CO)2(exa)2] rapidly via the monocarbonyl intermediate [Fe(CO)(exa)2CH3CN]. In CHCl3 solution, in the presence of CO and added bases, a series of complexes, [Fe(CO)(exa)2L], where L = pyridine, pyrrolidine, diethylamine and triphenylphosphine, was formed. However, with the exception of [Fe(CO)(exa)2(ø3P)], these monocarbonyl complexes were unstable with respect to disproportionation to cis-[Fe(CO)2(exa)2] and [Fe(exa)2L2]. No mixed-ligand monocarbonyl complexes were observed with Fe(dedtc)2.