(Table I). Alternatively, anhydrous hydrogen halide (HC1, HBr) can replace the concentrated aqueous acid (procedure B). In a third procedure, the polynitrobenzene is heated at reflux with concentrated hydrohalic acid alone for 15 min (procedure C). 1, 2, 3, 5-and 1, 2, 4, 5- tetranitrobenzenes (5 and 7) were converted to picryl halides 6 and l-halo-2, 4, 5- trinitrobenzenes 8, respectively, by this method. The reaction of 7 with HC1 by procedure ...
