REPLACEMENT OF ONE CO UNIT IN DICARBONYL(ETA(5)-CYCLOPENTADIENYL)COBALT DERIVATIVES BY BIS(TERT-BUTYLSULFONYL)ACETYLENE

The reaction of dicarbonyl(eta(5)-cyclopentadienyl) cobalt (1) and som e of the Cp-ring substituted congeners with bis(tert-butylsulfonyl)ace tylene (BTSA) results in the replacement of one CO group by the BTSA m oiety. The variation of the yields and reaction times indicates a depe ndence of the reactivity of 1-6 with BTSA as a function of substituent s. X-ray investigations of the products show that the alkyne unit is s trongly bound to the metal.