Crystal Packing: An Examination of the Packing of Molecules Approximately Isosteric with 4,5-Dichlorophthalic Anhydride

✍ Scribed by Doyle Britton; Wayland E. Noland; Matthew J. Pinnow; Victor G. Young Jr.

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: German
• Weight: 194 KB
• Volume: 86
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.200390102

✦ Synopsis

Abstract

The crystal structures of five 5,6‐disubstituted benzofurazan 1‐oxides are presented and compared with five previously reported structures: three polymorphs of 5,6‐dichlorobenzofurazan 1‐oxide plus 4,5‐dichloro‐ and 4,5‐dibromophthalic anhydride. All but one of these compounds pack with similar two‐dimensional layers. The benzofurazan oxides all show disorder about a crystallographic twofold or pseudo‐twofold axis. In addition, six complexes of phthalic anhydride and benzofurazan oxides are reported. With the packing in the complexes principally directed by the π complexing, the disorder, invariably found in the uncomplexed benzofurazan oxides, is diminished, and, in two cases, eliminated.