Studies on the Oxidation of Mandelic acid by Meta-periodic acid
| Main Authors: | P. S. Verma, K. C. Grover |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1969
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6460753 |
Daftar Isi:
- It has been found possible to estimate mandelic acid quantitatively by meta-periodic acid at 30° within a time limit of 20 hrs at pH~8 using, at least, three equivalents of periodate as against the reported oxidation at 100°. The reaction has been shown to be of the second order. The temperature coefficient was found to be of the order of 2.33 for the temperature range 35-45° and the energy of activation was 16.45 k. cals./mole at pH~6. The studies on the effect of added sulphate and acetate ions showed that there is an inihibiting salt effect and that the reactions takes place between periodate ion (theoretically \(IO_4^-+H_3IO_6^{--}\) ions) and mandelate ion as shown by the fact that the observed value of the rate constants becomes maximum at pH~8 similar to the product of calculated values of [C6H5CHOHCOO-] [\(IO_4^++H_3IO_6^{--}\)] ions. The reaction is acid catalysed, and the C—C bond fission is indicative of analogy with the oxidation of glycol or pinacol by periodate.