Interaction of chlorine dioxide with nitroxyl radicals

The formation of charge transfer complexes between chlorine dioxide and nit roxyl radicals (2,2,6,6-tetramethylpiperidin-1-oxyl, 4-hydroxy-2,2,6,6-tetr amethylpiperidin-1-oxyl, 4-oxo2,2,6,6-tetramethylpiperidin-1-oxyl, 4-methox y- 2,2,6,6-tetramethylpiperidin-1-oxyl, 4-acetyl-amido-2,2,6,6-tetramethylp iperidin-1-oxyl, 2,2,5,5-tetramethyl-4-phenyl-3-imidazolin-1-oxyl, and bis( 4-methoxyphenyl) nitroxide) in acetone, acetonitrile, n-heptane, diethyl et her, carbon tetrachloride, toluene, and dichloromethane was found by spectr ophotometry at -60-+20 degreesC. The thermodynamic parameters of complex fo rmation were determined. The radical structure affects its complex formatio n ability. The charge transfer complex is transformed into the correspondin g oxoammonium salt.