Triazine derivatives

The invention comprises the reaction product of an anhydride of a dibasic carboxylic acid with a triazine of the general formula in which R1 denotes -Cl, -OCH3 or -SCH3, R2 denotes hydroxyalkyl, hydroxyalkenyl or hydroxyalkynyl having 2-4 carbon atoms, R3 denotes hydrogen, alkyl, allyl or alkynyl having 1-4 carbon atoms, R4 denotes alkyl or alkynyl having 1-4 carbon atoms, chloroalkyl having 2 or 3 carbon atoms, ethyl bearing -OCH3, -OC2H5, -SCH3 or -SC2H5 as substituent, -SCH3, or alkyl having 2 or 3 carbon atoms and bearing -SH as substituent, and R5 denotes hydrogen, allyl or alkyl having 1-3 carbon atoms, or a salt thereof. The compounds are half-esters of the triazine and the dicarboxylic acid and result from the esterification of the hydroxyl group of the triazine. Many suitable starting materials and products are specified.ALSO:Agents for controlling undesired plant growth comprise a solid or liquid carrier and the reaction product of an anhydride of a dibacic carboxylic acid with a triazine of the general formula: wherein R1 is -Cl, -OCH3 or -SCH3, R2 is hydroxyalkyl, hydroxyalkenyl or hydroxyalkynyl having 2-4 carbon atoms, R3 is H, alkyl, alklyl or alkynyl having 1-4 carbon atoms, R4 is alkyl or alkynyl having 1-4 carbon p atoms, chloroalkyl having 2 or 3 carbon atoms, ethyl bearing -OCH3, -OC2H5, -SCH3 or -SC2H5 as substituent, -SCH3, or alkyl having 2 or 3 carbon atoms and bearing -SH as substituent, and R5 is -H, allyl or alkyl having 1-3 carbon atoms, or a salt thereof. The compounds are half-esters of the triazine and the dicarboxylic acid and result from esterification of the hydroxyl group of the triazine. Specified solid and liquid carriers are fertilisers, inert solid carriers, talc, diatomaceous earth, water, organic liquids, xylene, petroleum distillates and synthetic organic liquids. Other herbicides may also be present, for example, unspecified inorganic salts (borates), urea derivatives, carbomates, uracils and anilides. Examples are given.