“…A broad range of catalysts based on Pd,12 Ru,13 Rh,14 Ni,15 Ir,16 Fe,17 Au,18 Co,19 Os,20 Ti,21 Zr,22 Re,23 Y,24 Sc,25 Hf,26 Cr,27 lanthanides,28 actinides,29 or main group elements30 can promote alkyne dimerization, albeit with different grades of success with regard to selectivity. In particular, preferential preparation of head‐to‐tail enynes has been disclosed for aromatic13i, 14e, 16b, 24a or aliphatic12d, 14a,c,g,k, 22a, 24c, 26, 29b alkynes, although examples of selective initiators regardless of the substituent on the alkyne are limited to the catalysts of Nakamura (Ti),21a Trost (Pd),12b Eisen (Al),30b and Zhang (Au)18 and their respective co‐workers.…”