Crystal Packing of a Series of 1,2,3,4-Substituted Phenoxazine and Dibenzodioxin HeterocyclesClick to copy article linkArticle link copied!
- Lana K. HiscockLana K. HiscockDepartment of Chemistry and Biochemistry, Wilfrid Laurie University, 75 University Avenue West, Waterloo, Ontario N2L 3C5, CanadaMore by Lana K. Hiscock
- Kenneth E. Maly*Kenneth E. Maly*(K.E.M.) E-mail: [email protected]Department of Chemistry and Biochemistry, Wilfrid Laurie University, 75 University Avenue West, Waterloo, Ontario N2L 3C5, CanadaMore by Kenneth E. Maly
- Louise N. Dawe*Louise N. Dawe*(L.N.D.) E-mail: [email protected]Department of Chemistry and Biochemistry, Wilfrid Laurie University, 75 University Avenue West, Waterloo, Ontario N2L 3C5, CanadaMore by Louise N. Dawe
Abstract

Understanding and control of weak intermolecular interactions, including π-interactions, is an element toward the strategic design of supramolecular materials. In this work, we describe an approach to promoting cofacial π-stacking in the solid state by preparing polycyclic aromatic compounds that bear complementary electron-rich and electron-poor rings. Specifically, we describe the synthesis and single crystal structures of a series of six dissymmetric systems (three dibenzo-p-dioxins and three phenoxazines) comprised of one electron-rich and one electron-deficient ring. In all cases, anti-co-facial π–π interactions were observed, but no significant C–H···π interactions. These observations were compared with similar structures in the Cambridge Structural Database, and it was found that the presence of bulky substituents, lattice solvent, and stronger intermolecular interactions interfere with efficient π-stacking. Both qualitative and quantitative evaluations of the newly reported structures, and database examples, are included.
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