- Reductive dechlorination of atrazine using sodium-borohydride catalysed by cobalt(II) phthalocyanines
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A series of functional metallophthalocyanines have been synthesized to study their role as a catalyst towards the reductive dechlorination of atrazine using sodium borohydride as a mild reducing agent. The cobalt(II) phthalocyanine bearing nitro groups at the peripheral position is the most efficient catalyst with exceptionally high catalytic activity in comparison to other functional cobalt(II) phthalocyanines.
- Poonam,Kumari, Pratibha,Ahmad, Sohail,Chauhan, Shive Murat Singh
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- Trimethylstannylation of mono- and dichloroarenes by the SRN1 mechanism in liquid ammonia
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The photostimulated reaction of methyl 2,5-dichloro benzoate (1) or methyl 3,6-dichloro-2-methoxy benzoate (7) with -SnMe3 ions give good yields of the disubstitution products by the SRN1 mechanism in liquid ammonia. Conversely, in dark conditions, substrate 1 reacts with -SnMe3 ions to afford the mono-substitution products by the S RN1 mechanism. On the other hand, substrate 7 reacts with -SnMe3 ions in dark conditions to give mono-reduced product probably by a halogen metal exchange reaction. In addition, the photostimulated reaction of 2-chloro-N4-ethyl-N6- isopropyl-1,3,5-triazin-4,6-diamine (Atrazine, 11) with -SnMe 3 ions affords the reduced and substitution products in liquid ammonia-DMSO as co-solvent. Copyright
- Santiago, Ana N.,Basso, Silvana M.,Montanez, Juan P.,Rossi, Roberto A.
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- Electrocatalytic dechlorination of atrazine
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Atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine), a photosynthetic inhibitor that is used in large quantities for weed control in corn and sorghum, is dechlorinated in aqueous solution upon electrolysis at a reticulated vitreous carbon cathode
- Stock, Naomi L.,Bunce, Nigel J.
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- Rapid reductive dechlorination of atrazine by zero-valent iron under acidic conditions
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The dechlorination of atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine) via reaction with metallic iron under low-oxygen conditions was studied using reaction mixture pH values of 2.0, 3.0, and 3.8. The pH control was achieved through addit
- Dombek, T.,Dolan, E.,Schultz, J.,Klarup, D.
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- Kinetic and mechanistic aspects of the direct photodegradation of atrazine, atraton, ametryn and 2-hydroxyatrazine by 254 nm light in aqueous solution
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Atrazine (1), Atraton (2) and Ametryn (3) are photodegraded upon 254 nm irradiation, yielding 2-OH-atrazine (4) as a photoproduct. Dealkylation products are also generated, and 4-ethylamino-6-isopropylamino-(1,3,5)-triazine was also found as a photoproduct of 3. The main photoreaction is proposed to be an addition-elimination, yielding 4, which subsequently photodegrades. The ease of photodegradation depends on the electron availability at position C-2, the observed order of photoreactivity being 1 > 3 > 4 > 2. Copyright
- Azenha,Burrows,Canle L,Coimbra,Fernandez,Garcia,Peiteado,Santaballa
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p. 498 - 503
(2007/10/03)
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