75361-77-2Relevant academic research and scientific papers
(s-trans-η4-Diene)zirconocene Complexes
Erker, Gerhard,Wicher, Joachim,Engel, Klaus,Krueger, Carl
, p. 3300 - 3310 (2007/10/02)
In the presence of open-chain conjugated dienes treatment of zirconocene dichloride with lithium metal or photochemically induced reductive elimination of biphenyl from diphenylzirconocene yields (η%&4-diene)zirconocene complexes 2.Structural analysis of the butadiene complex 2a by X-ray diffraction for the first time reveals the formation of a mono-nuclear metal complex showing the coordination of both double bonds of the s-trans-conformer of the conjugated diene to the same transition metal center.The (s-trans-η4-diene)zirconocene complexes 2 equilibrate with their (s-cis-η4-diene)zirconocene isomers 4; both the isomers can readily be characterized NMR spectroscopically.
