Four polymorphs (polytypes) of 5,6-dimethylbenzofurazan 1-oxide

Doyle Britton, Victor G. Young, Wayland E. Noland, Matthew J. Pinnow, Christopher M. Clark

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

5,6-Dimethylbenzofurazan 1-oxide (Me2BF), C8H8N 2O2, occurs in four polymorphic forms that are polytypes of each other. Each polymorph of Me2BF contains molecules disordered about pseudo-twofold axes and arranged head-to-tail in ribbons, with the ribbons forming approximately planar layers held together by weak C-H⋯N and C-H⋯O interactions. Adjacent layers interact in different ways in the different polymorphs. In addition to twinning in the individual polymorphs, four examples of allotwining, that is, oriented overgrowths between different polymorphs, were found.

Original languageEnglish (US)
Pages (from-to)536-542
Number of pages7
JournalActa Crystallographica Section B: Structural Science
Volume68
Issue number5
DOIs
StatePublished - Oct 1 2012

Keywords

  • allotwinning
  • disorder
  • polymorphism

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