Crystal and molecular structure of 1-picryl-2-phenyl-2-(4-picrylamidophenyl)-diazenium betaine: analogy between a picramido group and an oxygen atom

Alexandru Balaban (1) , Titus Constantinescu (2) , Miron Teodor Caproiu (3) , Michel Giorgi (4) , Teodor Silviu Balaban (5)

1 Texas A&M University [College Station]
2 Institute of Physical Chemistry "I. G. Murgulescu"
3 Centre for Organic Chemistry "C. D. Nenitzescu"
4 AMU SPEC - Spectropôle - Aix Marseille Université
5 ISM2 - Institut des Sciences Moléculaires de Marseille

The title compound is formed by a non-trivial reaction involving two molecules of the stable free radical 2,2-diphenyl-1-picryl-hydrazyl and one molecule of N-methoxy-picramide. We could now perform an X-ray diffraction experiment on a single crystal and can fully confirm the betaine structure which has a central quino-noid ring with alternating long and short bonds.

Mots clés: DPPH; stable free radicals; crystal structure; push-pull aminyls

Domaines: Chimie organique; Cristallographie

Alexandru Balaban, Titus Constantinescu, Miron Teodor Caproiu, Michel Giorgi, Teodor Silviu Balaban. Crystal and molecular structure of 1-picryl-2-phenyl-2-(4-picrylamidophenyl)-diazenium betaine: analogy between a picramido group and an oxygen atom. Zeitschrift fur Naturforschung B, 2017, 72 (2), ⟨10.1515/znb-2016-0194⟩. ⟨hal-01683279⟩