January 19, 2007
Synthesis of Novel Ligands with Proximate Basic Functionality and Their Pt (II) Complexes: Novel System for Aerobic Oxidation of Methane
Laura L. Lazarusa, Janice Kunishigeb and Dr. Satoshi Takarab
aCalifornia State University California Los Angeles, Department of Chemistry and Biochemistry,
Los Angeles, CA 90032
bUniversity of Hawai’i at Manoa, Department of Chemistry, Honolulu, HI 96822
Abstract: Current methods to convert natural alkane resources, such as methane, to more viable products are generally inefficient and expensive. This factor, coupled with the high-cost of transportation from isolated reserves continues to prevent this abundant natural resource from being fully utilized. One possible solution to this problem lies in the design and development of novel transition-metal catalysts that could be used in the aerobic oxidation of alkanes. To synthesize practical organometallic catalysts for this purpose, the effect of ligand design on the redox potential of the metal center was explored. We attempted to prepare a series of mixed-donor, multi-dentate ligands (PNONP, PONOP, POOOP, PNNNP) using inert atmosphere techniques that were characterized by 1H and 31P NMR spectroscopy. These ligands will eventually be used to produce Pt (II) and Pd (II) catalysts for the purpose of methane activation.
 Labinger, J.A.; Bercaw, J.E. Understanding and Exploiting C-H Bond Activation. Nature. 2002, 417¸ 507-514.
 Crabtree, R.H. The Organometallic Chemistry of Alkanes. Chem. Rev. 1985, 85, 245-269.
 Passos, F.B.; Oliviera, E.R.; Mattos, L.V.; Noronha, F.B. Effect of the Support on the Mechanism of Partial Oxidation of Methane on Platinum Catalysts. Catal. Lett. 2006, 110, 161-167.
 Shilov, A.E.; Shulpin, G.B.; Activation and Catalytic Reactions of Alkanes in Solutions of Metal Complexes. Russ. Chem. Rev. 1987, 56, 442-464.
 Luinistra, G.A.; Wang, L.; Stahl, S.S.; Labinger, J.A.; Bercaw, J.E. C-H Activation by Aqueous Platinum Complexes: A Mechanistic Study. J. Organometall. Chem. 1995, 504, 75-91.
CSULA Department of Chemistry and Biochemistry
UH Manoa Department of Chemistry