AZO - HYDRAZO TAUTOMERISM: FURTHER EVIDENCE BASED ON POLAROGRAPHIC REDUCTION AND ACIDITY FUNCTION OF SOME HETEROCYCLIC COMPOUNDS CONTAINING OXIMINO - GROUP

Yıl 1994, Cilt: 40 , 1 - 2, 01.01.1994

Ahlam M. A. Helmy

https://doi.org/10.1501/Commub_0000000414

Öz

Potentiometric pKa and polarographic behaviour of 1, 3-indandione-monoxime and four of its substituted derivatives were investigated in buffer solution of pH ~ 2-12. The results showed that the compounds are in the azo-form, where its reduction wave precedes that of the oxime. A mechanism for the electrodic processes was proposed. Half-wave potentials showed fair cor- relation with Hammett’s er constants while pKa is practically independent.

Anahtar Kelimeler

AZO - HYDRAZO, POLAROGRAPHIC, HETEROCYCLIC

Kaynakça

• Azo-hydrazo tautomerism: Further evidence based on polarographic reduction and acidity function of some heterocyclic compounds containing oximino-group