Organic salts of guanazole – Seeking for new materials for second harmonic generation

Four novel organic salts of 3,5-diamino-1,2,4-triazole (guanazole) with malonic, glutaric, adipic and L-malic acids have been prepared and X-ray structural analyses have been performed within our project focused on the preparation of new non-linear optical materials. The salts guanazolium(1+) hydrogen adipate and guanazolium(1+) hydrogen L-malate crystallize in the non-centrosymmetric space groups of monoclinic (Cc) and orthorhombic systems (P212121), respectively. Unfortunately, the remaining two salts guanazolium(1+) hydrogen malonate and guanazolium(1+) hydrogen glutarate belong to the centrosymmetric space group P-1 of the triclinic system.