Synthesis and Reactivity of Cobalt Bis(amido) Complexes

Authors:

Javier Fajardo Jr., Michael I. Lipschutz

Mentors:

  • T. Don Tilley, Professor of Chemistry, University of California, Berkeley
  • Vincent Lavallo, Assistant Professor of Chemistry, University of California, Riverside

As the search for alternative chemical fuels and more efficient and environmentally friendly synthetic methods continues, the design of novel catalytic chemical transformations is of growing importance. Currently, valuable reactions involving C-H, C-C, and small molecule activation are mediated by rare and precious metals such as iridium, platinum, and rhodium. As a result, the development of catalysts based on less expensive, less toxic, and more readily available first row transition metals is essential. Since nickel bis(amido) species have been shown to promote Si-H activation, the focus of this project is to produce isoelectronic cobalt complexes capable of performing hydrosilation and exhibiting similar reactivity to those of precious metals. To this end, the coordinatively unsaturated cobalt bis(amido) complexes Co[N(SiMe3)(2,6-iPr2C6H3)]2 and K{Co[N(SiMe3)(2,6-iPr2C6H3)]2} were synthesized and characterized by a combination of 1H nuclear magnetic resonance (NMR) spectroscopy and X-ray crystallography. Preliminary results indicate that both compounds are catalytically active towards the hydrosilylation of terminal olefins with secondary silanes. Reaction of the anionic cobalt complex with CO2 gas also yielded the novel Co(I) dimer, [CoN(SiMe3)(2,6-iPr2C6H3)]2, whose properties are under investigation.


Presented by:

Javier Fajardo Jr.

Date:

Saturday, November 23, 2013

Poster:

72

Room:

Poster Session 2 - Villalobos Hall

Presentation Type:

Poster Presentation

Discipline:

Chemistry