Synthesis and structure of amino-functionalized cyclopentadienyl vanadium complexes and evaluation of their butadiene polymerization behavior

We have synthesized a number of bis-1,1,-amino-functionalized vanadocenes and vanadocene monochlorides; the bis-1,1,-amino-functionalized vanadocenes represent the first examples of structurally characterized compounds ofthis type, and the bis-1,1,-amino-functionalized vanadocene monochlorides represent the first examples synthesized and characterized. We report the catalytic behavior of some of the complexes toward butadiene and observe that amino-functionalized cyclopentadienyl vanadium phosphine chloride complexes behave much differently from their nonfunctionalized cyclopentadienyl derivatives.