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http://142.54.178.187:9060/xmlui/handle/123456789/19163| Title: | Polarographic Behaviour of Some Sulphonic—aryl—hydrazono Dyes Pyrazolin-5-one Dyes |
| Authors: | BASHEIR A. EL-SHETARY MOHAMED S ABDEL-MOEZ FAROUK I. ZIDAN SHAKER L. STEVAN |
| Issue Date: | 20-Sep-1988 |
| Publisher: | HEJ Research Institute of Chemistry, University of Karachi, Karachi. |
| Citation: | BASHEIR, A., MOHAMED, S. A. M., FAROUK, I. Z., & SHAKER, L. S. (1988). Department of Chemistry, Faculty of Education Ain Shams University, Cairo HeZ1'. 0p0Z1'. s. J. Chem. Soc. Pak, 10(2). |
| Abstract: | Polarographic studies of some sulphonic aryl (or napthol ) hydrazono -I-phenyl -3-methyl -2-pyraz01in-5-one have been carried out in ethyl alcohol B. R. buffer solutions in the pH range 1.8 - 12.0. The nurrber of reduction waves was found to depend on the pH value of the solution and the structure of the dye stuff. All the conpounds gave a single, well defined irreversible wave between values 2.0-9.0. The E Of this wave is pH dependent but its i remains almst constant throughout the entire range. The E was shifted towards more negative potential showing that protonation preceeds reduction. The sulphonic group causes a shift of the wave and plateau suffers a minimum at value higher than 9.0. The reduction corresponds to consumption of four electrons leading to the amine stage. A general npchanism for the reduction process is suggested and discussed. |
| URI: | http://142.54.178.187:9060/xmlui/handle/123456789/19163 |
| ISSN: | 0253-5106 |
| Appears in Collections: | Issue 03 |
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| ViewByVolume.aspx?v=144&i=VOLUME%2010,%20NO3,%20SEPT%201988.htm | 150 B | HTML | View/Open |
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