Research Article: Bis[(diamino­methyl­idene)aza­nium] 5-(1-oxido-1H-1,2,3,4-tetra­zol-5-yl)-1H-1,2,3,4-tetra­zol-1-olate

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): Rong Fan, Ping Li, Seik Weng Ng.


The anion of the title salt, 2[C(NH2)3]+·C2N8O22−, lies on a center of inversion and its two five-membered rings are coplanar. The guanidinium cation forms N—H⋯O and N—H⋯N hydrogen bonds to the anion, generating an eight-membered ring. Other hydrogen bonds lead to the formation of a three-dimensional network.

Partial Text

For the synthesis of 1,1′-dihy­droxy-5,5′-bis­tetra­zole, see: Tselinskii et al. (2001 ▶).