Regioselective Homo- and Codimerization of α-Olefins Catalyzed by Bis(2,4,7-trimethylindenyl)yttrium Hydride

The novel dimeric bis(2,4,7-trimethylindenyl)yttrium hydride [(Ind‘)<sub>2</sub>Y(μ-H)]<sub>2</sub> (<b>3</b>) has been prepared from (Ind‘)<sub>2</sub>Y(μ-Cl)<sub>2</sub>Li(THF)<sub>2</sub> (<b>1</b>) via the alkyl complex (Ind‘)<i><sub>2</sub></i>YCH(SiMe<sub>3</sub>)<sub>2</sub> (<b>2</b>). The hydride <b>3</b> is a catalyst that effects the regio- and stereoselective homodimerization of a range of α-olefins at 80 °C as well as head-to-head codimerization of styrene with other α-olefins.