Syntheses, spectroscopy, and crystal structures of 3-(4-bromo­phen­yl)-1,5-di­phenyl­formazan and the 3-(4-bromo­phen­yl)-1,5-di­phenyl­verdazyl radical and the crystal structure of the by-product 5-anilino-3-(4-bromo­phen­yl)-1-phenyl-1H-1,2,4-triazole

Acta Crystallographica Section E: Crystallographic Communications

Schnakenburg, G.¹  Meyer, A.² 

[1] University of Bonn, Institute of Inorganic Chemistry, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany;University of Bonn, Institute of Physical and Theoretical Chemistry, Wegelerstrasse 12, 53115 Bonn, Germany

关键词: CRYSTAL STRUCTURE;    H-ATOM TRANSFER;    TAUTOMERISM;    HYDROGEN BONDING;    RADICAL;    DYE;    HETEROCYCLE;   

DOI  :  10.1107/S2056989018001913

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The title compounds, C19H15BrN4, C20H16BrN4 and C20H15BrN4, are nitro­gen-rich organic compounds that are related by their synthesis. The verdazyl radical, in which stacking leads to anti­ferromagnetic inter­actions, was reported previously [Iwase et al. (2013). Phys. Rev. B, 88, 184431]. For this compound, improved structural data and spectroscopic data are presented. The other two compounds have been crystallized for the first time and form stacks of dimers, roughly along the a-axis direction of the crystal. The formazan mol­ecule shows signs of rapid intra­molecular H-atom exchange typical for this class of compounds and spectroscopic data are provided in addition to the crystal structure. The triazole compound appears to be a side-product of the verdazyl synthesis.

【 授权许可】

CC BY