Abstract

AbstractStereospecific polymerization of conjugated dienes, especially 1,3‐butadiene and isoprene, is summarized. Various transition metal catalysts are utilized for the stereospecific polymerization of conjugated dienes. For example, Ti, V, Co, Ni, and lanthanides forcis‐1,4‐polymerization of 1,3‐butadiene, V, Cr, Fe, and lanthanides fortrans‐1,4‐polymerization of 1,3‐butadiene, and Cr, Co, and Fe for 1,2‐polymerization of 1,3‐butadiene. Lanthanide catalysts are very effective for stereospecific polymerization of isoprene. Stereospecific living polymerization of conjugated dienes is also achieved. A mechanism of the polymerization affording stereoregular polymers and stereospecific polymerization of other diene monomers is also mentioned.

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