β-Hydrogen-Containing Zirconium Alkyls with the Doubly-Bridged Bis(dimethylsilanediyl)dicyclopentadienyl Ligand. X-ray Molecular Structures of [Zr(SiMe2)2(η5-C5H3)2ClEt] and [Zr(SiMe2)2(η5-C5H3)2Et]2(μ-CH2CH2) | Publicación