Synthesis Of 2- (1- Naphthyl) Ethanoic Acid ( Plant Growth Regulator ) From Coal Tar And Its Application

Plant growth regulators, which are commonly called as plant hormones, naturally produced non-nutrient chemical compounds involved in growth and development. Among the various kinds of plant growth regulators, 2- (1- Naphthyl ) ethanoic acid especially encourages the root development of the plant. In this work, NAA was successfuly synthesized from naphthalene which was extracted from coal tar. The purity of naphthalene, -Chloromethyl naphthalene, -Naphthyl acetonitrile, - Naphthyl acetic acid or 2 - ( 1-Naphthyl ) ethanoic acid were also confirmed by Thin Layer Chromatography, and by spectroscopy methods. The yield percent of NAA based on naphthalene was found to be 2.1%. The yield percent of naphthaleneFrom coal tar is found to be 4.09%. The effect of NAA on root development was also studied in different concentrations of soy bean (Glycine max)and cow pea (Vigna catjang walp).