Abstract
The crystal structures of two rubrene derivatives, 5,11-diphenyl-6,12-bis[4-(trifluoromethyl)phenyl]tetracene, C44H26F6, and 5,11-bis(4-tert-butylphenyl)-6,12-diphenyltetracene, C50H44, are presented. Each are substituted on diagonal (5/11) phenyl rings. Each derivative has one polymorph reported previously. A discussion of the differences between each derivative and its previously reported polymorph is provided. The triclinic packing of the CF3-substituted structure is similar to the packing of the parent rubrene's triclinic polymorph. In the tert-butyl-substituted structure, a planar tetracene core formed, which has been hypothesized but never published. Crystallization conditions are provided as they differ from previous reports.
Funder
National Science Foundation
Publisher
International Union of Crystallography (IUCr)
Subject
Condensed Matter Physics,General Materials Science,General Chemistry