The many of nitroaniline derivatives are materials with nonlinear optical (NLO) properties . The molecules of nitroanilines contain the amino group which can be protonated and new compounds can be obtained in acidic conditions. Therefore, a search of compounds with NLO properties can be expanded for a large group of organic ionic compounds. Previously, some complexes of 2-methyl-4-nitroaniline with inorganic acids were studied . As a continuation of those studies, here we present crystal structure of six new salts of 2-methyl-5-nitroaniline (2Me-5NA) with inorganic acids.
Five of obtained crystals have centrosymmetric space groups, but one does not have the centre of symmetry. Structures of all the compounds are stabilized by N−H•••A- hydrogen bonds between -NH3+ group and inorganic anion. The stability of all the salts was checked in the rage 295-100K and no phase transitions were revealed.
Fig. 1. The networks of hydrogen bonds in crystal structures of (H-2Me-5NA)HSO4, (H-2Me-5NA)Br and (H-2Me-5NA)NO3 at 295K..