“…Potassium selenocyanate was obtained from Aldrich Chemical Co. Tributylsulfonium perchlorate was synthesized according to the method of Milligan and Minor (17). Butyl thiocyanate (IR 2154 cm"1, sharp) was prepared by the reaction of butyl bromide and potassium thiocyanate (18), and butyl isothiocyanate (IR 2094 cm"1, broad) was synthesized from n-butylamine and carbon disulfide (19). Ethyl acetate was from Burdick and Jackson Distilled-in-Glass.…”