In this study phenylselenocyanate and some of its derivatives (o-Cl, p-Cl, p-Br, o-NO2, p-NO2, o-CH3, p-CH3, o-COOH, p-COOH, p-OCH3 substituted) were synthesized (3a-3j). The synthesized compounds were converted to 5-aryl-1H-tetrazole (4a-4j), by Et3N . HCl-NaN3 in toluene, which are a new series of phenylselanyl-1H-tetrazoles. The structure of all the presently synthesized compounds were confirmed using spectroscopic methods (FTIR, H-1 NMR, MS). (c) 2007 Wiley Periodicals, Inc.