Formation of vinyl ether derivatives in the reaction of tributyltin hydride with cluster supported Fischer carbene complexes: structural characterisation of [(CO)(6)Fe2Te2{mu-PhC = CC(OEt)}W(CO)(5)]

Treatment of the complex [(CO)(6)Fe2EE' {mu-C(Ph)-C-C(OEt)=M(CO)(5)}], (1: E = S, E' = Se; M = Cr; 2: E = S, E' = Se; M = W; 3. E = E' = Te; M = Cr an d 4. E = E' = Te; M = W), with excess Bu3SnH in hexane at 0 degrees C produ ces enol ether derivatives: (Co)(6)Fe-2{mu-EC(Ph)(H)-C(E')-C(H)(OEt)} (E/Z- 5: E=S, E'=Se and E/Z-6: E=E'=Te). All the compounds have been characterise d by IR and H-1-,C-13- or Se-77-NMR spectroscopy. The structure of [(CO)(6) Fe2Te2{mu-(Ph)C=CC(OEt)}W(CO)(5)] has been established crystallographically . (C) 1999 Elsevier Science S.A. All rights reserved.