hey guys, can someone please help me with o-chlorobenzonitrile? I have read the write up by zealot but i'm still unsure about the procedure.
"To a hot soln of 50g NaOH in 400mls water there's added 195g o-chlorobenzoic acid. Carefully neutralize with NH3 or NaHCO3 (how much should i use?)and add with heating(how hot?) 105g (~5% excess) ZnSO4 in 400mls water. The precipitated salt is dried for prolonged time at 200 C and mixed intimately with 205g Pb(SCN)2(what's this stuff?). The mixture is coffeeground and dried at 120-140 C for a prolonged time, then heated on open flame (do i put an open flame directly to the mixture?)- the mixture melts and gases are evolved.
Distilled nitrile is treated with NH4OH,(hpw much? treated?) steam-distilled and salted out. Yield 137g (80%), mp=43-46 C, bp=232 C. The rxn usually takes place within 30-60 mins, but the duration of dryings makes the method quite time-consuming."
Thanks Guys
