4,7‐Bis(4‐pyridylethynyl)‐2,1,3‐benzothiadiazole and its dipyridinium diperchlorate |
| |
Authors: | Md Akhtaruzzaman Masaaki Tomura Yoshiro Yamashita |
| |
Abstract: | The title compound, C20H10N4S, and its dipyridinium salt, 4,4′‐(2,1,3‐benzodiazol‐4,7‐diyldiethynyl)dipyridinium diperchlorate, C20H12N4S2+·2ClO4?, display bond alternation in the 2,1,3‐benzothiadiazole rings, which suggests their quinonoid character. The dipyridinium dication molecules stack along the a axis and form a dimer with short S?N interheteroatom contacts 3.146 (4) Å] between the two 1,2,5‐thiadiazole rings. The dimer is surrounded by the perchlorate anions with which it forms a large number of intermolecular N—H?O and C—H?O hydrogen bonds. |
| |
Keywords: | |
|
|