Synthesis and reactivity of η2-diazine tungsten (0) complexes

INOR 189

Yogesh Surendranath, yogeshs@mit.edu1, Hill Harman2, and W. Dean Harman, wdh5Z@virginia.edu2. (1) Department of Chemistry, Nocera Group, Massachusetts Institute of Technology, 2-301, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, (2) Department of Chemistry, University of Virginia, McCormick Road, P.O. Box 400319, Charlottesville, VA 22904-4319
Several complexes of aromatic diazines coordinated to the π-basic transition metal fragment, {TpW(NO)(PMe3)} (Tp = hydridotrispyrazolylborate), have been synthesized. Unsubstituted diazines show a strong preference for binding to the metal through the nitrogen lone pair in an η1 manner. However, the addition of pendant groups to the aromatic heterocycle can lead to the formation of isolable η2 linkage isomers. The location and nature of the substituents on the ring can be used to control which η2 linkage isomer is obtained. Examples of η2-species bound on the carbon-carbon double bond, as well as the carbon-nitrogen double bond, have been observed. The steric environment surrounding the nitrogen lone pairs and the electronic properties of the ligand dictate binding specificity. The reactivity of these novel η2-diazines is currently under investigation.

 

Organometallic General and Catalysis
7:00 PM-9:00 PM, Sunday, 13 March 2005 Convention Center -- Hall D, Poster

Division of Inorganic Chemistry

The 229th ACS National Meeting, in San Diego, CA, March 13-17, 2005