Friday, 12 November 2004 - 4:40 PM
440

This presentation is part of: Inorganic Chemistry II (General Session)

Preparation of chiral platinum bis(oxazoline) complexes for electrochemically promoted hydrogenation

Melissa L. Golden1, Kara L. Cetto1, Samuel T. N. Freeman1, Arnold L. Rheingold2, Lev Zakharov2, and Bernadette T. Donovan-Merkert1. (1) University of North Carolina at Charlotte, Charlotte, NC, (2) University of California at San Diego, La Jolla, CA

As part of our program on electrochemically-promoted catalytic asymmetric synthesis, we are exploring the synthesis, characterization, and electrochemical behavior of chiral platinum bis(oxazoline) (BOX) complexes.  Successful synthesis of a phenyl (BOX)PtCl2 complex (1) was achieved by treating Zeise's dimer with a phenyl-substituted BOX ligand.  Single crystal X-ray analysis of 1 revealed the C2 symmetry of the molecule, such that one phenyl substituent lies above and the other below the square planar platinum center.  The synthesis of the analogous (t-butyl BOX)PtCl2 (2) was achieved but was complicated by the formation of a bimetallic complex as well as competing hydrolysis and C-H bond activation reactions.  The synthesis and characterization of 1 and 2 plus a discussion of the competing reactions in the synthesis of 2 will be presented.


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