Photochemical route to unusual tri-tungsten ferrocenylacetylene cluster [W3{μ-η2,η2-(H)C≡CFc}2(CO)12] and a dimetallacyclodecatetraene [W2{μ-η2,η2,η2,η2-(Fc)C=C(H)C(H)=C(Fc)C(Fc)=C(H)C(H)=C(Fc)}(CO)6]

Abstract

Low temperature photoreaction between tungsten hexacarbonyl and ferrocenylacetylene yielded two unusual metal containing stable compounds, the tritungsten cluster, [W3(μ-η2,η2-(H)C≡CFc)2(CO)12](1), and ditungsten-1,4,5,8-ferrocenylcyclodecatetraene, [W2{μ-η2,η2,η2,η2-(Fc)C=C(H)C(H)=C(Fc)C(Fc)=C(H)C(H)=C(Fc)}(CO)6] (2). Both compounds were characterised by IR and 1H and 13C NMR spectroscopy and their molecular structures established by single crystal X-ray diffraction methods.