[Todos] Seminarios DQIAQF - INQUIMAE, lunes 27 de agosto- 13 hs.

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Seminarios DQIAQF - INQUIMAE, lunes 27 de agosto- 13 hs.

Aula de Seminarios INQUIMAE - DQIAQF
Facultad de Ciencias Exactas y Naturales
Ciudad Universitaria - Pab. 2  -  Piso 3


 *The Organometallic Chemistry of Organoactinides: Activating C-C, C-Si and
C-H bonds *

*Moris S. Eisen*
*Schulich Faculty of Chemistry, Technion-Israel Institute of Technology,
Haifa 32000, Israel***
**e-mail: chmoris en tx.technion.ac.il*

Neutral and cationic organoactinide complexes have been extensively studied
in the last decade as catalysts for several organic transformations.
Polymerization of alkenes, oligomerization, intermolecular hydroamination,
and hydrosilylation of terminal alkynes, and 1,1-insertion of isonitriles
into terminal alkynes comprise some of these processes. However, due to the
high oxophilicity of the actinide complexes, all the substrates containing
oxygen atoms were excluded because of the expected low activity of these
complexes due to the predictable oxygen-actinide interaction. In our
attempts to discover new catalytic reactions for actinide-based complexes,
we have found their surprising activity towards the polymerization of
cyclic mono- and diesters. This discovery arouses the conceptual question
about the activity of oxo-actinide complexes.1 To expand the scope of the
actinides in catalysis, we have pursued the dimerization of aldehydes to
esters.2 In order to show the generality of the process, and to be able to
proposed a suitable mechanistic pathway, we have investigated various
organoactinide complexes in addition to kinetic and thermodynamic studies.
We will also present the synthesis, characterization of oxide-bridged
uranium complexes, and the catalytic reactivity for the metathesis reaction
of silylalkynes, phenylsilane and the C-H activation of arenes introducing
the concept of copy and pasting a SiH3 group.

1.    M. S. Eisen,  *Topicsin Organomet. Chem., **2010*,*31, 157-184.*
2.    M. Sharma, T. Andrea, N. J. Brookes, B. F. Yates, and M. S. Eisen, *J.
Amer. Chem. Soc.**2011*, *133*, 1341-1356.