1.3.5- Triazines, alkyl-, side-chain

The chloro-.v-triazine is sorbed as a neutral molecule on a soil surface through hydrophobic interactions involving the alkyl side chains and through polar interactions involving one of the ring N-atoms and a Bronsted acid site. 

Triazines are analysed in positive-ion mode only. In ESI, protonated molecules are observed. Under in-source CID conditions, limited fragmentation due to the loss of an alkyl side chain is observed [9, 12, 14, 22, 34]. In APCI, triazines show an abundant protonated molecule and some fragmentation due to the loss of the alkyl side chain, e.g., for terbutylazine and teibutryn [9, 14, 22, 32, 35-36]. 

Ubrizsy and Matolcsy (1961) were the first to describe 2-chloro-4,6-bis(alkyl-amino)-j-triazines, in which one of the alkyl side-chains carries a cyano substituent. They substituted a cyano group or another polar group in the side-chain in order to obtain herbicides with improved water-solubility which would thus be more suitable for use in areas of low precipitation. 

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