“…One of the first transitionmetal ketenylidene complexes described was a tricobalt cluster reported by Seyferth et al in 1974(Seyferth et al, 1974. Since then, the scope of ketenylidene clusters has been expanded to include metals such as osmium (Went et al, 1987), ruthenium (Sailor & Shriver, 1985), molybdenum (Ramalakshmi et al, 2015), and manganese (Crespi & Shriver, 1986) to name a few.…”