Oxidative ring cleavage of 2,3-dihydrophthalazine-1,4-dione in aqueous and non-aqueous solutions: Electrochemical and kinetic studies

Autor:	Davood Nematollahi, Fahimeh Varmaghani, Pari Mirahmadpour, S S Hosseiny Davarani
Rok vydání:	2014
Předmět:	Solvent Coulometry Autoprotolysis Phthalic acid chemistry.chemical_compound Aqueous solution chemistry Inorganic chemistry General Chemistry Cyclic voltammetry Electrochemistry Acetonitrile
Zdroj:	Journal of Chemical Sciences. 126:1923-1928
ISSN:	0973-7103 0974-3626
DOI:	10.1007/s12039-014-0738-1
Popis:	Electrochemical oxidation of 2,3-dihydrophthalazine-1,4-dione (DHP) has been investigated in aqueous and some amphiprotic and aprotic non-aqueous solvents by cyclic voltammetric and controlled-potential coulometric techniques. Our data shows that electrochemically generated phthalazine-1,4-dione (PTD) in water and amphiprotic non-aqueous solvents participates in an oxidative ring cleavage (ORC) reaction to form phthalic acid. The rate of this reaction is dependent. On autoprotolysis constant (K SH) and basicity of the solvent. Therefore, in the aprotic non-aqueous solvents such as acetonitrile and DMSO, the rate of ORC is too slow to be observed on the time-scale of cyclic voltammetry.
Databáze:	OpenAIRE
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