The synthesis, spectral analysis and biological activities of 4-phenyl-2-hydroxy-chlorosubstituted-2-imino-1,3 thiazines have been carried out. In this case 4-(2'-hydroxy-3',5'-dichlorophenyl)-6-(hexyl)-2-iminophenyl-3,6-dihydro-1,3-thiazine (H) has been screened. The compound H was synthesized from 2'-hydroxy-3’,5’-dichlorophenyl-4-(hexyl)chalcone (a”) by the action of phenylthiourea.The compound (a”) was synthesized from 2’-hydroxy-3’,5’-dichloroacetophenone by the action of heptanaldehyde in ethanol and 40% NaOH. The nanoparticles of the compound H has been prepared by using ultrasonic technique. The titled compound and its nanoparticles were screened for their growth promoting activity on some flowering plants viz. Crysanthemum coronarium, Dahalia pinnata, Verbena officinalis, Iberis amara.
*Chhaya D. Badnakhe (Fri,) studied this question.