Answers are grounded in this paper and cite their sources.
Terminal acetylenes react with [FeH2(dmpe)2][dmpe = bis(dimethylphosphino)ethane] to form metal acetylides and diacetylides; the crystal structure of trans-Fe(CCPh)2(dmpe)2 shows that the seven atoms of the C–CC–Fe–CC–C grouping are colinear and the bond lengths indicate a strong Fe–C bond and an unusually short C–C triple bond.
No takes yet. Share an insight, caveat, or question.
Field et al. (1990) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: