Acyclic Organozirconocenes

18-out isomer. The q2-ketone complexes 19 undergo insertion of 7i-components to form zirconacycles 20 [20,21]. 

Isonitrile insertion into zirconacycles to afford iminoacyl complexes 28 is fast, but rearrangement to q2-imine complexes 30 is slow. In the case of tBuNC, the rearrangement does not occur. Amines 32 are formed on protonolysis of the q2-imine complex. The q2-imine complexes 30 readily undergo insertion of Ti-components (alkenes, alkynes, ketones, aldehydes, imines, isocyanates) to provide a wide variety of products 37 via zirconacycles 36. The overall sequence gives a nice demonstration of how a number of compo- 

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Insertion of 1-Halo-l-lithioalkenes into Acyclic Organozirconocene Chlorides... 

Insertion of l-lithio-l,2-dihaloalkenes into acyclic organozirconocene chlorides... 

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