Zirconocene stilbene complex

Zirconocene-imide complex (91) reacted smoothly with stilbene oxide to produce the corresponding cycloadduct (93) (Equation 41) [46]. The stereochemistry of the... 

The first X-ray structure of a zirconocene(II)—alkene complex, zir-conocene(II)-stilbene stabilized by phosphine, was reported by Takahashi and coworkers [7]. Basically, the formation of zirconocene alkene or alkyne complexes may be achieved in three different ways (a) by a reductive elimination process starting from alkyl, alkenyl or aryl zirconocene(lV) complexes (Eq. 1, and Eqs. 5-6) [1-5,8,9], or (b) by ligand exchange reactions involving carbonyl or phosphine complexes (Eq. 7), or (c) by -C-C bond cleavage of zircona-cyclopentanes or zirconacyclopentenes (Eqs. 8-9) [10,11]. 

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