1212 OF Bennett, ]. Johnson and S. Galletto Vol. 12 Sehrmrl O' N42 0 Pfllll A N“, N11,' PalhB 0- NH“ 0' A?' Since the orientation of formation of an aryne relative to ® o 0 L it substitucnts present, depending as it does on the hydrogen acidities, appears to be essentially controlled by the induc- tive effect of the substituents (7), the general mode of aryne formation shown by Path A would be consistant with the expected substituent effects leading to the observed ...