Novel calcium half-sandwich complexes for the living and stereoselective polymerization of styrene.
Cryst. bis(2-Me2N-a-Me3Si-benzyl)calcium.bul.(THF)2 and 9-Me3Si-fluorene were reacted in benzene at 65 Deg for 90 min to give orange cryst. I in 73% yield. I when used for living polymn. of styrene gave polystyrene with high syndiotacticity and dispersion index.
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