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Chemical constitution and activity of bipyridinium herbicides. Part XIV. Reduction potential and herbicidal activity of 4,4′‐(1,3,4‐thiadiazole‐2,5‐diyl)‐ and 4,4′‐(1,3,4‐oxadiazole‐2,5‐diyl)bis(1‐methylpyridinium) diiodides
Author(s) -
Kennedy Debra A.,
Summers Lindsay A.
Publication year - 1981
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570180236
Subject(s) - chemistry , oxadiazole , aqueous solution , medicinal chemistry , stereochemistry , organic chemistry
Abstract The diquaternary salts 4,4′‐(1,3,4‐thiadiazole‐2,5‐diyl)bis(1‐methylpyridinium) diiodide and 4,4′‐(1,3,4‐oxadiazole‐2,5‐diyl)bis(1‐methylpyridinium) diiodide are reduced in aqueous solution in the p H range 5.4‐8.0 to radical cations at a potential (Eo) of ‐0.39 V and ‐0.48 V, respectively. Their activity as herbicides is reported.