Azole. 47. Über 3-Thiomorpholino- und 3-(4-Methylpiperazino)-5-nitroindazole.

The structures of 5-nitro-3-thio­morpholino-1 H-indazole, C₁₁H₁₂N₄O₂S, (II a), and 3-(4-methyl­piperazino)-5-nitro-1 H-indazole-methanol-water (2/1/1), 2C₁₂H₁₅N₅O₂·CH₃OH·H₂O, (III a), are described. In the crystal lattice of (II a), the mol­ecules are linked into dimers by N-H⃛N hydrogen bonds. The asymmetric unit of (III a) contains two independent mol­ecules of the indazole moiety, one mol­ecule of methanol and one of water. The three components of (III a) are linked by hydrogen bonds to form double chains running along the x axis. π-Stacking involving the indazole moieties occurs in both compounds. [ABSTRACT FROM AUTHOR]