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

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

doi:10.1107/S0108768112037457

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

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

Chemistry (Twin Cities)

Research output: Contribution to journal › Article › peer-review

3 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 language	English (US)
Pages (from-to)	536-542
Number of pages	7
Journal	Acta Crystallographica Section B: Structural Science
Volume	68
Issue number	5
DOIs	https://doi.org/10.1107/S0108768112037457
State	Published - Oct 1 2012

Keywords

allotwinning
disorder
polymorphism

Publisher link

10.1107/S0108768112037457

Find It

Find It at U of M Libraries

Cite this

@article{815a87b5ee9d4851a1a5813ffc0083cf,

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

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.",

keywords = "allotwinning, disorder, polymorphism",

author = "Doyle Britton and Young, {Victor G.} and Noland, {Wayland E.} and Pinnow, {Matthew J.} and Clark, {Christopher M.}",

year = "2012",

month = oct,

day = "1",

doi = "10.1107/S0108768112037457",

language = "English (US)",

volume = "68",

pages = "536--542",

journal = "Acta Crystallographica Section B: Structural Science",

issn = "0108-7681",

publisher = "International Union of Crystallography",

number = "5",

}

TY - JOUR

T1 - Four polymorphs (polytypes) of 5,6-dimethylbenzofurazan 1-oxide

AU - Britton, Doyle

AU - Young, Victor G.

AU - Noland, Wayland E.

AU - Pinnow, Matthew J.

AU - Clark, Christopher M.

PY - 2012/10/1

Y1 - 2012/10/1

N2 - 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.

AB - 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.

KW - allotwinning

KW - disorder

KW - polymorphism

UR - http://www.scopus.com/inward/record.url?scp=84866703169&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84866703169&partnerID=8YFLogxK

U2 - 10.1107/S0108768112037457

DO - 10.1107/S0108768112037457

M3 - Article

AN - SCOPUS:84866703169

SN - 0108-7681

VL - 68

SP - 536

EP - 542

JO - Acta Crystallographica Section B: Structural Science

JF - Acta Crystallographica Section B: Structural Science

IS - 5

ER -

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

Abstract

Keywords

Publisher link

Find It

Other files and links

Fingerprint

Cite this