“…The N21═C21 bond length [1.269 (4) Å] agree with values reported in the literature [1.261 (4) Å in the 4-amino-3methtl-1,2,4-triazole-5-thione derivative of p-nitrobenzaldehyde (Liu et al, 1999), 1.267 (2) Å in 4-(4-hydroxybenzylidenamino)-4H-1,2,4-triazole hemihydrate (Zhu et al, 2000) and 1.271 (3) Å in the 1-acetyl-4-(p-chlorobenzylideneamino)-3-methyl-4,5-dihydro-1H-1,2,4-triazol-5-one (Çoruh et al, 2003)]. The presence of a substituent on N3 causes a lengthening of the N-N bond length [N1-N3= 1.385 (4) Å] with respect to the corresponding bonds in 5-(2-chloro- Puviarasan et al, 1999] and in 4methyl-1,2,4-triazole and 1-methyltetrazole [N-N= 1.344 (2) Å; Palmer & Parsons, 1996]. The S-C bond lengths [S11 -C12= 1.692 (6) Å and S11-C15= 1.685 (5) Å] agree with value reported in the literature (Vrábel et al, 2005;Yılmaz et al, 2006)].…”