Pentafluoro-λ6-sulfanylacetylene complexes of cobalt

Mechanistic Studies of Transition-Metal-Catalyzed [2 + 2 + 2] Cycloaddition Reactions

“…Seppelt et al 88 carried out the reaction of pentafluoro-λ 6 sulfanylacetylene derivatives with [Co 2 (CO) 8 ] and were able to isolate complexes of structure analogous to 17, 18, and 20, although 1,2,4-(SF 5 ) 3 -substituted benzenes were only obtained upon bromine degradation from the fly-over complex.…”

Strong distortions in hexacarbonyldicobalt complexes by push–pull effects

“…Among the 331 species listed in the Cambridge Crystallographic Data Base, 186 were not generated from symmetrically substituted alkynes. Among those latter structures, the most prominent were the complexes of 1-6 depicted in Chart 1 [5][6][7]. In 1-5 the alkyne unit contains a chalcogen substituent on one side of the triple bond and an alkyl, aryl or ester group on the other.…”

Synthesis and further use of SF5-alkynes as platforms for the design of more complex SF5-containing products

“…In the 80s and 90s, Seppelt and Berry used these alkynes for coordination chemistry of nickel [34] or cobalt [35][36][37] complexes. More recently, in 2006, polymer chemists became interested in SF5 alkynes as monomer precursor and SF5-ethynylthiophene 17 was synthesized with an excellent 78% yield over two steps with the use of NaOH for the dehydrobromination step; thus expanding the scope of alkynes to those featuring heteroaromatic substituents (scheme 11).…”