ACETYLENIC DERIVATIVES OF FE-2(CO)(6)(MU-SE-2) - SYNTHESIS AND SPECTROSCOPIC CHARACTERIZATION OF [(CO)(6)FE-2(MU-SEC(H)=C(H)SE)] AND [((CO)(6)FE2SE2)(2)(MU-C(H)-C(H))]

The new acetylenic derivatives [(CO)(6)Fe-2{mu-SeC(H)=C(H)Se}] and [{(CO)(6)Fe2Se2}(2){mu-C(H)-C(H)}] have been isolated from the room-temperature reaction of Fe-2(CO)(6)(mu-Se-2) with acetylene in methanol solvent containing sodium acetate. The products have been characterized by IR and H-1, C-13 and Se-77 NMR spectroscopy. The NMR spectroscopic features of the related phenylacetylene derivatives[(CO)(6)Fe-2{mu-SeC(Ph)=C(H)Se}] and [{(CO)(6)Fe2Se2}(2){mu-C(Ph)-C(H)}] are also reported.