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Thermodynamic Study on Tautomerism of Salicylidene – 3, 4 – dimethyl aniline Via Coupling with Diazotized Sulfanilic Acid Salt | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 35, 2014, Pages 460-466 | ||
| Author | ||
| Ebtehag . Z . Sulyman | ||
| Abstract | ||
| Abstract A new spectrophotometric method has been developed for the determination of trace amounts of Salicylidene – 3, 4 – dimethyl aniline (I) via coupling with sulfanilic acid sodium salt at pH =7.2 . The method is simple, precise and selective for the determination of enol contents of in a range 1.65 to 3.47 ppm. The study is extended to study a tautomerism reaction of type enol keto in molecule (I), beside the thermodynamic study of such reaction in solution state. The results show the enol content in molecule (I), is predominant as evident from the positive value of average ΔG function of value 1.552kJ. mol-1. Moreover, other calculated ΔH and ΔS parametrs have an avarage negative values of about – 9.016 kJ. mol-1 and –33.765 J. mol-1. K-1 respectively, these support the tautomerism reaction. | ||
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