Collect. Czech. Chem. Commun. 1984, 49, 398-403

Photochemical reduction of potassium chromate solubilized with 18-crown-6 in chloroform

Jana Muchováa and Vladislav Holbab

a Research Institute of Chemical Technology, 836 03 Bratislava
b Department of Physical Chemistry, Comenius University, 842 15 Bratislava


The cyclic polyether 18-crown-6 was used as solubilizer to obtain a solution of potassium chromate in chloroform. While perfectly steady in darkness, the solution decomposes under the action of light. The decomposition reaction was monitored by measuring the decrease in the absorbance of chromate ions, and the rate constants, the temperature coefficient of the rate constant, and the quantum yield were determined. The mechanism of the reaction is discussed.