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http://nopr.niscpr.res.in/handle/123456789/41385| Title: | Kinetics and mechanism of oxidation of aliphatic aldehydes by pyridinium bromochromate |
| Authors: | Khanchandani, Ritu Sharma, Pradeep K Banerji, Kalyan K |
| Issue Date: | Jul-1996 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The oxidation of six aliphatic aldehydes by pyridinium bromochromate (PBC), to the corresponding carboxylic acids, is first order each in PBC and the aldehyde. The reaction is catalysed by H+; the H+ dependence has the form, kobs = a + b [H+]. Oxidation of deuterated acetaldehyde (MeCDO) showed the presence of a substantial kinetic isotope effect (kH/kD=6.40 at 288 K). Oxidation of acetaldehyde is studied in 19 organic solvents. The solvent effect has been analysed using Taft's and Swain's multiparametric equations. The rate constants correlate well with Taft's o* constants; reactions being negative. A mechanism involving transfer of a hydride ion has been suggested. |
| Page(s): | 576-579 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.35A(07) [July 1996] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 35A(7) 576-579.pdf | 615.34 kB | Adobe PDF | View/Open |
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