| Abstract: | After a brief account of the present knowledge on the mechanism of the allylnickel complex catalyzed stereospecific butadiene polymerization, synthesis and catalytic properties of the cationic allylnickel(II) complexes, C3H5NiL2]PF6 (L = P(OAlk)3, P(OAr)3, PPh3, AsPh3, SbPh3, MeCN, Me3CNC, 1,5–COD), are described. From kinetic and 31P-NMR spectroscopic investigations, especially with C3H5Ni(P(OPh)3)2]PF6 as a typical trans-catalyst, the definite course of the catalytic stereoregulation has been elucidated. |
