Isolation and characterization of an iodide bridged dimeric palladium complex in carbonylation of methanol

TitleIsolation and characterization of an iodide bridged dimeric palladium complex in carbonylation of methanol
Publication TypeJournal Article
Year of Publication2005
AuthorsTonde, SS, Kelkar, AA, Bhadbhade, MM, Chaudhari, RV
JournalJournal of Organometallic Chemistry
Volume690
Issue6
Pagination1677-1681
Date PublishedMAR
Type of ArticleArticle
ISSN0022-328X
Keywordsdirneric palladium, IR spectroscopy, methanol carbonylation, palladium catalyst, reaction mechanism, UV
Abstract

Palladium-catalyzed carbonylation of methanol in presence of iodide promoters was investigated. Iodide bridged palladium dimeric complex, [PPh3CH3](2)[Pd2I6] was isolated from the carbonylation reaction mixture and characterized using X-ray crystallography. Reaction mechanism was proposed based on IR and UV spectroscopic characterizations of catalytic species involved in the catalytic cycle. The isolated dimeric palladium species, [Pd2I6](2-) underwent carbonylation to give monomeric species [PdI3CO](-) at atmospheric pressure of carbon monoxide. It was also observed that PPh3 plays an important role to avoid catalyst deactivation at higher temperatures. Turnover frequency (TOF) of 1052 h(-1) was achieved using Pd(OAC)(2)-HI-PPh3 catalyst system at 175 degrees C. (c) 2005 Elsevier B.V. All rights reserved.

DOI10.1016/j.jorganchem.2005.01.010
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

2.336

Divison category: 
Catalysis and Inorganic Chemistry
Center for Material Characterization (CMC)