Abstract. Direct hydroxylation of aromatic hydrocarbons, viz. benzene, toluene and anisole to phenol, cresols and methoxyphenols respectively has been studied by using hydrogen peroxide as oxidant and vanadium based systems such as vanadyl tetraphenoxyphthalocyanine, VO(acac)2, 20% V2O5/Al2O3, 14% V2O5/TiO2, 11% V2O5/ZiO2 as catalysts in acetonitrile under biphasic reaction conditions. Amon…