C₂H (upper panels) and c-C₃H₂ (lower panels) spectra towards two different positions in the Orion Bar: one in the dissociation front where we have carried out a line survey (dark blue spectrum), and the other towards clump No. 10 of Lis & Schilke (2003) that we call the molecular peak (light blue spectrum). The spectra towards the molecular peak were extracted from the 1 mm and 3 mm reprojected maps.