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

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ID: 150147
2018
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Abstract
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.
Reference Key
schnakenburg2018actasyntheses, Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Gregor Schnakenburg, Andreas Meyer
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Journal Disability and rehabilitation
Year 2018
DOI
10.1107/S2056989018001913
URL
http://scripts.iucr.org/cgi-bin/paper?S2056989018001913
Keywords
crystal structure hydrogen bonding tautomerism dye heterocyclechemistry

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