Abstract
In the title compound, C20H14, a naphthalene ring system is linked at the 2-position to the 2-C atom of the five-membered ring of an azulene unit. The compound crystallizes with two reasonably similar molecules in the asymmetric unit. Neither molecule is perfectly planar: the r.m.s. deviations from the best fit planes through all non-H atoms are 0.092 and 0.091 Å for the two molecules. The dihedral angle between the molecular planes is 49.60 (4)°. The naphthalene and azulene ring systems are inclined at dihedral angles of 6.54 (12) and 5.68 (12)° in the two molecules. The crystal structure exhibits two sets of parallel layers, a typical edge-to-face herringbone packing arrangement. The structure is stabilized by an extensive series of weak C—H⋯π interactions.
Highlights
State Key Laboratory of Applied Organic Chemistry and College of Chemistry and, Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000, People’s
The naphthalene and azulene ring systems are inclined at dihedral angles of 6.54 (12) and 5.68 (12) in the two molecules
The structure is stabilized by an extensive series of weak C—H interactions
Summary
C20H14, a naphthalene ring system is linked at the 2-position to the 2-C atom of the five-membered ring of an azulene unit. The compound crystallizes with two reasonably similar molecules in the asymmetric unit. Neither molecule is perfectly planar: the r.m.s. deviations from the best fit planes through all non-H atoms are 0.092 and 0.091 Å for the two molecules. The dihedral angle between the molecular planes is 49.60 (4). The naphthalene and azulene ring systems are inclined at dihedral angles of 6.54 (12) and 5.68 (12) in the two molecules. The crystal structure exhibits two sets of parallel layers, a typical edge-to-face herringbone packing arrangement. Data collection: SMART (Bruker 1997); cell refinement: SAINT (Bruker 1997); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL
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