Ethanethiol cobalt complex

Reaction systems containing cobalt and nickel were characterized by the production of flocculent precipitates of compounds other than hydroxides in the presence of all thiols, except for thiophenol and tert-butanethiol. Samples of these complexes produced from the ethanethiol system were washed, dried, and subjected to microanalysis. For nickel, the precipitate could be separated into two fractions by extracting with... 

The methods described here are based on the thermal stability of such clusters under CO pressure.4 In the case of Co2Fe(CO)9S, the complex itself is stable under hydroformylation conditions (130-180 °C, 50-150 bar CO and H2) and is formed under such conditions from almost every sulfur-containing substance, iron, cobalt, and carbon monoxide.1 Ethanethiol is used in the procedure as the sulfur source because of its reactivity. The dihydride cluster Fe3H2(CO)9S is not directly accessible by this method because it is a thermally much less stable species but the anion Fe3H(CO)9S" can be prepared in this way and its acidification yields the desired complex. 

A pentanuclear mixed chalcogen/carbonyl cluster complex with ethanethiolate ligands is the cobalt-containing species [Co5(SEt)5(CO)io], which was structurally characterized by X-ray methods (Fig. 22). 

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