Compounds of the formula (I), L, L′, L″, L1, L′1, L″1, L2, L′2, L″2, L3, L′3, L″3, L4, L′4, L″4, L5, L′5, L″5, L6, L′6, L″6, L7, L′7, L″7, L8, L′8 and L″8 independently of one another are hydrogen or an organic substituent; and/or one or more of the pairs L3 and L5, L′3 and L′5 or L″3 and L″5 together denote a single bond, provided that the respective X, X′ or X″ is not a single bond; and/or L3 and L5, L′3 and L′5 or L″3 and L″5 together denote an organic linking group; and/or one or more of the pairs L1 and L3, L1 and L, L5 and L7, L′1 and L′3, L′1 and L′, L′5 and L′7, L″1 and L″3, L″1 and L″, or L″5 and L″7, together denote an organic linking group; provided that at least one of L, L′, L″, L1, L′1, L″1, L2, L′2, L″2, L3, L′3, L″3, L4, L′4, L″4, L5, L′5, L″5, L6, L′6, L″6, L7, L′7, L″7, L8, L′8 and L″8 is other than hydrogen; X, X′ and X″ independently of one another are a single bond, CRaRb O, S, NRc or NCORc; Ra, Rb and Rc independently of one another are hydrogen or an organic substituent; and Y is an inorganic or organic anion; are suitable as photolatent acid generators.