Author/Authors :
Holger Braunschweig، نويسنده , , Carsten von Koblinski، نويسنده , , Frank Michael Breitling، نويسنده , , Krzysztof Radacki، نويسنده , , Chunhua Hu، نويسنده , , Lars Wesemann، نويسنده , , Thiemo Marx، نويسنده , , Ingo Pantenburg، نويسنده ,
Abstract :
A boron-bridged amido-cyclopentadienyl ligand was recently shown to form constrained-geometry titanium-complexes that are capable of olefin polymerisation. Here, the synthesis of the corresponding amido-indenyl ligand η1-C9H7B(NiPr2)N(H)Ph (C9H7=indenyl) (2a/2v) and its allyl–vinyl isomerisation are discussed. Deprotonated 2a reacts with ZrCl4 to give the strongly distorted zirconocene-type complex [Zr{η5:η1-C9H6B(NiPr2)NPh}2] (3) in a 2:1 reaction. All compounds have been characterised by multinuclear NMR methods and structures of both the ligand 2a and the complex 3 have been confirmed by X-ray diffraction.
Keywords :
Boron , Boranes , Amido-cyclopentadienyl ligand , Constitutional isomers , zirconocene
