Isolation and characterization of an iodide bridged dimeric palladium complex in carbonylation of methanol
| Title | Isolation and characterization of an iodide bridged dimeric palladium complex in carbonylation of methanol |
| Publication Type | Journal Article |
| Year of Publication | 2005 |
| Authors | Tonde, SS, Kelkar, AA, Bhadbhade, MM, Chaudhari, RV |
| Journal | Journal of Organometallic Chemistry |
| Volume | 690 |
| Issue | 6 |
| Pagination | 1677-1681 |
| Date Published | MAR |
| Type of Article | Article |
| ISSN | 0022-328X |
| Keywords | dirneric 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. |
| DOI | 10.1016/j.jorganchem.2005.01.010 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 2.336 |