Bifunctional imidazolylphosphine ligands as hydrogen bond donors promote N-H activation and O-H activation on Platinum

INOR 802

Yi Gong1, Douglas Grotjahn, grotjahn@chemistry.sdsu.edu1, Antonio G. DiPasquale2, Lev N. Zakharov3, and Arnold L. Rheingold3. (1) Department of Chemistry and Biochemistry, San Diego State University, 5500 Campanile drive, San Diego, CA 92182-1030, (2) Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, (3) Department of Chemistry and Biochemistry, University of California - San Diego, 9500 Gilman Drive, San Diego, CA 92093
Pt complexes with bulky imidazolyl phosphine ligands 1 were synthesized in order to explore the combined effects of metal and heterocycle on small molecule reactivity. When R2=CH3, linear Pt(0) complexes Pt(1)2 were obtained. In contrast, when R2=H, N-H activation occurred to give complex 2. The reactivites of Pt(1)2 and hydrido Pt(II) complex 2 with RO-H compounds of acidity ranging from acids to water are very different. Complex 1 reacted only with more acidic species whereas 2 reacted with all O-H compounds tested, with O-H activation, and the product H-Pt-OR was stabilized by hydrogen bonding interactions between oxygen atom and N-H on the imidazole ring.

 

Organometallics
7:00 PM-10:00 PM, Tuesday, 12 September 2006 Moscone Center -- Hall D, Poster

Sci-Mix
8:00 PM-10:00 PM, Monday, 11 September 2006 Moscone Center -- Hall D, Sci-Mix

Division of Inorganic Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006