Phototransformation of Triadimefon on Glass and Soil Surfaces

Photodegradation of triadimefon has been studied on glass and soil surfaces. A number of photoproducts have been isolated and characterised by NMR, IR and MS. Photolysis resulted in considerable amounts of 1‐(4‐chlorophenoxymethyl)‐1,2,4‐triazole, 1‐(4‐chlorophenoxy)‐2,2‐dimethyl‐1‐(1,2,4‐triazol‐1‐yl)propane, 1‐(1,2,4‐triazol‐1‐yl)‐3,3‐dimethylbutan‐2‐one and 1‐(4‐chlorophenoxy)‐3,3‐dimethyl‐1‐(1,2,4‐triazol‐1‐yl)butan‐2‐ol. Rates of photodegradation on glass and soil surfaces under UV and sunlight followed first‐order kinetics with a significant correlation coefficient. Photodegradation was greater on alluvial soil than on laterite soil.