| 摘要 |
PROBLEM TO BE SOLVED: To obtain a catalyst used to effect the bulk polymerization of a monomer having a polymerizable unsaturation such an acrylic monomer without causing the runaway of the reaction by using an organometallic compound and a thiol. SOLUTION: An organometallic compound of the formula is used. In the formula, M is a group 4A, 4B, 5A, or 5B metal, chromium, ruthenium, or palladium; R1 and R2 are each an optionally substituted aliphatic hydrocarbon group, an optionally substituted alicyclic hydrocarbon group, an optionally substituted aromatic hydrocarbon group, an optionally substituted silicon-containing group, H, or a single bond, provided that R4 and R2 together may bond the two five- membered rings to each other and that a plurality of adjoining R1s or R2s may be combined to each other to form a cyclic structure; a and b are each 1-4; X is a halogen, a hydrocarbon group at least part of the H atoms of which may be substituted by halogens; and n is 0 or an integer equal to the valence of the metal M minus 2.
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