Use of an organometallic palladium ozazoline catalyst for the hydrolysis of methylparathion Academic Article

abstract

• Reaction of (S)-4-carbomethoxy-2-phenyl-2-oxazoline with Pd(OAc) 2 leads to the formation of the ortho-palladated complex (S,S)-di--(acetate)-bis{2-[2-(4-carbomethoxy)oxazolinyl]phenyl-C,N} dipalladium(II) (1). In the presence of water, this complex reacts with methylparathion to produce p-nitrophenol as well as two oxazoline palladium dimethylthiophosphate complexes (2 and 3), which have been observed in solution by 31P NMR. This reaction is accompanied by racemization of the oxazoline ligand and ultimately produces the dinuclear complex (R,S)-di--(dimethylthiophosphate-S,S)-bis{2-[2-(4-carbomethoxy)oxazolinyl] phenyl-C,N}dipal-ladium(II) (4), which features bridging dimethylthiophosphate ligands. At pH 9-10, complex 1 serves as a precatalyst for the hydrolysis of methylparathion. The reaction rate has a first-order dependence in substrate and palladium catalyst with a second-order rate constant of 726 ( 30) M -1 s -1 at pH 9.0.

authors

• Gabbai, Francois

published proceedings

• ORGANOMETALLICS

author list (cited authors)

• Kim, M., Liu, Q. C., & Gabbai, F. P.

citation count

• 24

complete list of authors

• Kim, M||Liu, QC||Gabbaii, FP

publication date

• November 2004

publisher

• American Chemical Society (ACS)  Publisher

published in

• Organometallics  Journal

keywords

• 34 Chemical Sciences
• 3402 Inorganic Chemistry

Digital Object Identifier (DOI)

• 10.1021/om049687c

start page

• 5560

end page

• 5564

volume

• 23

issue

• 23

URL

• http://dx.doi.org/10.1021/om049687c