5,11-Bis(4-tert-butylphenyl)-6,12-diphenylnaphthacene (form A)
2007
The title compound, C50H44, is a derivative of rubrene where tert-butyl side groups are added to two of the pendant aromatic rings. Two polymorphs of this derivative, the title compound (form A) and form B, have been identified. The molecule of form A displays a strongly twisted naphthacene backbone. The in-plane arrangement differs from the classical herringbone structure, resembling a slip–stack structure type with the backbones separated by a minimum 7.0 A in the direction of possible π-stacking.
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