“…[12,[15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] The most effective tool for preparation of high-molecular-weight substituted polyacetylenes is the chain coordination polymerization of corresponding acetylenic monomers with transition metal catalysts (Ta and Nb catalysts for the polymerization of disubstituted monomers with bulky substituents, W for less bulky disubstituted monomers and W, Mo, Ni, Ru, Pd and particularly Rh catalysts for the polymerization of monosubstituted ones). [16,22,27,[32][33][34][35][36][37][38] In the case of monosubstituted polyacetylenes, the type of catalyst applied for synthesis usually governs the configurational structure of prepared polymers. [16,39] Rh catalysts, which were shown to operate in the insertion propagation mode, give highly stereoregular, head-to-tail cis-transoid polyacetylenes [27,[40][41][42][43][44][45] denoted as ''high-cis'' polyacetylenes.…”