Metal catalyzed activation of E-H bonds, E = Si, Ge, Sn

Renzo Nelson Arias Ugarte, University of Texas at El Paso

Abstract

A new catalytic system involving iron and molybdenum complexes of the type: (η⁵-C₅H₅)M(CO) _nMe, and (η⁵-C₅H₅)M(CO) _n-1(PPh₃)Me, M = Fe, n = 2 (1); M = Mo, n = 3 (2), were used to catalyze the dehydrogenative dimerization of di-t-butyltin dihydride to 1,2-dihydro-1,1,2,2-tetra- t-butyl-distannane, ^tBu₂HSn-SnH ^tBu₂ both photochemically and thermally. The thermal catalytic process is much more efficient than the photochemical process and the Mo catalysts are relatively more active than the corresponding Fe catalysts. A mechanism involving oxidative addition and reductive elimination steps has been suggested involving the intermediacy of (η⁵-C₅H₅ )M(CO)_nSn^tBu₂H. This complex was observed during the reaction and was independently synthesized and completely characterized by single crystal X-ray structural analysis and ¹³C, ¹¹⁹Sn and ¹H NMR spectroscopy. It was also shown to be catalytically active for dehydrogenative dimerization, Scheme 1.1.*^ *Please refer to dissertation for diagrams.^

Subject Area

Chemistry, Inorganic

Recommended Citation

Renzo Nelson Arias Ugarte, "Metal catalyzed activation of E-H bonds, E = Si, Ge, Sn" (January 1, 2011). ETD Collection for University of Texas, El Paso. Paper AAI3490984.
http://digitalcommons.utep.edu/dissertations/AAI3490984

 COinS