title: Crystal structure of diethyl 2-amino-6-[(thio-phen-3-yl)ethyn-yl]azulene-1,3-di-carboxyl-ate.
abstract: The title compound, C22H19NO4S, has an almost planar geometry supported by intra-molecular N-H⋯O and C-H⋯O hydrogen bonds. The thio-phene ring is inclined to the azulene ring by 4.85 (16)°, while the eth-oxy-carbonyl groups are inclined to the azulene ring by 7.0 (2) and 5.7 (2)°. In the crystal, mol-ecules are linked by pairs of N-H⋯O hydrogen bonds, forming inversion dimers with an R 2 (2)(12) ring motif. The dimers are linked via C-H⋯π inter-actions, forming sheets parallel to (10-1).
authors.affiliation: Institut für Organische Chemie, TU Bergakademie Freiberg, Leipziger Strasse 29, D-09596 Freiberg/Sachsen, Germany.
authors.forename: Sebastian
authors.initials: S
authors.lastname: Förster
authors.affiliation: Institut für Organische Chemie, TU Bergakademie Freiberg, Leipziger Strasse 29, D-09596 Freiberg/Sachsen, Germany.
authors.forename: Wilhelm
authors.initials: W
authors.lastname: Seichter
authors.affiliation: Institut für Organische Chemie, TU Bergakademie Freiberg, Leipziger Strasse 29, D-09596 Freiberg/Sachsen, Germany.
authors.forename: Edwin
authors.initials: E
authors.lastname: Weber
keywords: 3-thienylethyn­yl; C—H⋯π inter­actions; azulene; crystal structure; hydrogen bonds; thio­phene
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Chemistry. 2013 Apr 26;19(18):5721-30
references.pmid: 23447514
references.citation: Nano Lett. 2014 May 14;14(5):2941-5
references.pmid: 24745894