‘Agostic’ metal–alkenyl β-CH interaction in (C 5 H 4 Me) 2 ZrCl(CHCMe)ZrCl(C 5 H 5 ) 2

For the title compound (C5H4Me)2ZrCI(CHCMe)ZrCI(C5H5)2(7), which was prepared by hydrozirconation of (C5H4Me)2ZrCI(CCMe)(6), an ‘agostic’ zirconium–alkenyl β-CH interaction was demonstrated by n.m.r. and X-ray diffraction studies.