“…A variety of ruthenium complexes containing trispyrazolyl, [131][132][133][134] P(CH 2 CH 2 PR 2 ) 3 , [126,127] N(CH 2 CH 2 PR 2 ) 3 , [135] pentamethylcyclopentadienyl, [136] indenyl, [137,138] and maltolato ligands, [139] the metathesis catalysts [RuCl 2 (PCy 3 ) 2 -(=CHPh)] [140] and [RuCl 2 (PiPr 3 ) 2 (=C=CHPh)], [141,142] as well as a dinuclear (C 5 H 5 ) 2 Ru 2 complex [143] promote the formation of Z and E enynes. Polyaddition of 2,7-diethynyl-9,9-dioctylfluorene with [RuCl 2 (PiPr 3 ) 2 ( = C = CHPh)] in the presence of N-methylpyrrolidine produces polymers containing the enynyl fragment with high Z selectivity.…”