| 摘要 |
<p>Provided are 1) a complex containing a monoanionic tridentate ligand represented by the following general formula (I), 2) a polymerization catalyst comprising said complex and 3) a high cis-1,4-isoprene polymer, a high cis-1,4- butadiene polymer, a high cis-1,4-isoprene-styrene copolymer, a high cis-1,4-butadiene-styrene copolymer, a high cis-1,4- butadiene-high cis-1,4-isoprene copolymer and a high cis-1,4- butadiene-high cis-1,4-isoprene-styrene copolymer having sharp molecular weight distribution which are produced by using said polymerization catalyst.</p> |
