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Updated: May 18, 2026

Scale-up Chemical Synthesis of Thermally-activated Delayed Fluorescence Emitters Based on the Dibenzothiophene-S,S-Dioxide Core
Published on: October 24, 2017
2,5-Diamino-thio-phene-3,4-dicarbonitrile
Abstract:
In the title compound, C(6)H(4)N(4)S, the planar mol-ecule lies across a crystallographic mirror plane. In the crystal, the mol-ecules form centrosymmetric dimers through cyclic amino N-H⋯N hydrogen-bonding associations with cyano N-atom acceptors [graph set R(2) (2)(12)] and these dimers are extended through amine-cyano N-H⋯N associations into a three-dimensional network.
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Nomenclature of Carboxylic Acid Derivatives: Amides and Nitriles
The IUPAC and common names of amides are derived from the parent carboxylic acid, by replacing the suffix “oic acid” and “ic acid,” respectively, with “amide.” In the following example, the IUPAC name ethanamide is derived from ethanoic acid, and the common name, acetamide, is obtained from acetic acid.
Preparation of Nitriles
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism
Electrophilic Aromatic Substitution: Nitration of Benzene
Diazonium Group Substitution: –OH and –H
Diazonium Group Substitution with Halogens and Cyanide: Sandmeyer and Schiemann Reactions

