DIE BILDUNG (E)(Z)-ISOMERER ALKENYLZIRCONOCEN-KOMPLEXE

Article abstract of DOI:10.1016/0022-328X(83)80116-8

Photolysis of the hydrozirconation product 1(E) of phenylacetylene yields a 70/30 mixture of (Z)- and (E)-β-styrylzirconocene chloride.Reaction of the 1(E)/1(Z) mixture with organolithium or Grignard reagents gives alkenylzirconocene complexes with a substantial excess of the (Z)-isomer.The photochemically induced geometrical isomerization of alkyl- and aryl(alkenyl)zirconocenes can also be observed, provided the decomposition rate of these organozirconium complexes is being sufficiently reduced by added triphenylphosphine or trimethylphosphite.