Dimepiperate, S-(1-methyl-1-phenylethyl) piperidine-1-carbothioate (I) was degraded in aqueous solution by ultraviolet irradiation into piperidine (II), alpha-methylstyrene (III), acetophenone (IV), and formaldehyde (V). The reaction followed first-order kinetics. In sunlight the reaction occurred only in the presence of a sensitiser and afforded the same four photolytic degradation products. In the absence of oxygen the herbicide was converted much more rapidly, but yielded only (II) and (III) as products. A mechanism which accounts for the formation of the photoproducts is proposed.
PHOTOLYSIS OF DIMEPIPERATE IN AQUEOUS-SOLUTION / Pusino, Alba; Gessa, C; Liu, Wp. - In: PESTICIDE SCIENCE. - ISSN 0031-613X. - 34:3(1992), pp. 269-271. [10.1002/ps.2780340313]
PHOTOLYSIS OF DIMEPIPERATE IN AQUEOUS-SOLUTION
PUSINO, Alba;
1992-01-01
Abstract
Dimepiperate, S-(1-methyl-1-phenylethyl) piperidine-1-carbothioate (I) was degraded in aqueous solution by ultraviolet irradiation into piperidine (II), alpha-methylstyrene (III), acetophenone (IV), and formaldehyde (V). The reaction followed first-order kinetics. In sunlight the reaction occurred only in the presence of a sensitiser and afforded the same four photolytic degradation products. In the absence of oxygen the herbicide was converted much more rapidly, but yielded only (II) and (III) as products. A mechanism which accounts for the formation of the photoproducts is proposed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
