title: 5-(Prop-2-yn-1-yl)-5H-dibenzo[b,f]azepine: ortho-rhom-bic polymorph.
abstract: In the title ortho-rhom-bic polymorph (space group Iba2), C17H13N, the dihedral angle between the benzene rings is 55.99 (10)° and the azepine ring adopts a boat conformation. In the crystal, mol-ecules are linked by C-H⋯π contacts. The previously-reported polymorph [Yousuf et al. (2012 ▶). Acta Cryst. E68, o1101] crystallizes in the monoclinic system (space group P21/c) with two mol-ecules in the asymmetric unit.
authors.affiliation: Department of Physics, Faculty of Science, An Najah National University, Nabtus West Bank, Palestine.
authors.forename: M M M
authors.initials: MM
authors.lastname: Abdoh
authors.forename: S
authors.initials: S
authors.lastname: Madan Kumar
authors.forename: K S
authors.initials: KS
authors.lastname: Vinay Kumar
authors.forename: B C
authors.initials: BC
authors.lastname: Manjunath
authors.forename: M P
authors.initials: MP
authors.lastname: Sadashiva
authors.forename: N K
authors.initials: NK
authors.lastname: Lokanath