SYNTHESIS AND REACTIVITY OF DIFERROCENYL- THIOKETONE, DIFERROCENYL-SELENOKETONE, AND DIFERROCENYL-TELLUROKETONE

Chalcogenoketones (Fc)2C=X 1a (X = S, Fc = Ferrocenyl), 1b (X = Se), a nd 1c (X = Te) are synthesized by reaction of diferrocenylketone with P4S10, bis(dimethylaluminum)-selenide, bis(dimethylaluminum)-telluride , respectively. Reaction with [tetrahydrofurane][M(CO)5](M = Cr, Mo, W ) yields, for 1a, the complexes [(Fc)2C=S][M(CO)5] 2ad (M = Cr), 2af ( M = W), and [H3C-C(=O-H)S][W(CO)5] 3; and for 2b, the complex [(Fc)2C= Se][W(CO)5] 2bf. Telluroketone 1c does not form a complex; instead det elluration takes place and tetraferrocenylethylene (Fc)2C=C(Fc)2 is ob tained quantitatively. The structure of compound 3 has been determined by X-ray diffraction study. All compounds, except the extremely air-s ensitive chalcogenoketones 1b and 1c, have been characterized by the u sual spectroscopic and analytical methods.