Studies on mechanism of 2-pyridinecarboxaldehyde oxidation by dichromates in strongly acidic aqueous solutions. The unusual reaction order on concentration of the aldehyde

• Autorzy: Kita E. , Kita P. , Uścińska G.
• Języki publikacji: EN

Abstrakty

EN

2-Pyridinecarboxaldehyde (pyad) has been oxidized by Cr2O7(-2) ion at pH range 0-1 to 2-pyridinecarboxylic acid (pyac). The produced CR(III) exists in the form of three complex ions: [CR(pyac)(H2O)4](2+), [Cr(pyac)2(H2O)2](+) and [Cr(H2O)6](3+). The reaction follows unusual mixed fourth-order rate law: first-order on concentrations of H(+)-aq and CR(VI) and second-order on concentration of the aldehyde. Mechanism of the reaction has been discussed.

Słowa kluczowe

EN

kinetics; aldehyde oxidation; Cr(VI) reduction; Cr(III)-2-pyridinecarboxylic acid complexes

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1998
• Tom: Vol. 72, nr 8
• Strony: 1949--1957
• Opis fizyczny: Bibliogr. 24 poz., tab., wykr.

Twórcy

autor

Kita E.

autor

Kita P.

autor

Uścińska G.

• Department of Chemistry N. Copernicus University 87-100 Toruń Poland