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Updated: Jun 1, 2026

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
Sodium 5-amino-1,3,4-thia-diazole-2-thiol-ate dihydrate
Jiayi Wu1, Yifeng Wang, Guo Yi
1State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310014, People's Republic of China.
Abstract:
There are two 5-amino-1,3,4-thia-diazole-2(3H)-thiolate anions in the asymmetric unit of the title compound, Na(+)·C(2)H(2)N(3)S(2) (-)·2H(2)O, which are almost perpendicular to each other [dihedral angle = 84.64 (6)°]. The two Na(+) cations are in distorted fourfold coordinations by O atoms of the water molecules. The crystal structure is stabilized by N-H⋯S, O-H⋯N and O-H⋯S hydrogen bonds.
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1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by water loss...

