title: A monoclinic polymorph of N-(3-chloro-phen-yl)benzamide.
abstract: The title compound, C(13)H(10)ClNO, (I), is a polymorph of the structure, (II), first reported by Gowda et al. [Acta Cryst. (2008), E64, o462]. In the original report, the compound crystallized in the ortho-rhom-bic space group Pbca (Z = 8), whereas the structure reported here is monoclinic P21/c (Z = 4). The principal difference between the two forms lies in the relative orientations of the phenyl and benzene rings [dihedral angle = 8.90 (13)° for (I) and 61.0 (1)° for (II)]. The inclination of the amide -CONH- units to the benzoyl ring is more similar [15.8 (7)° for (I) and 18.2 (2)° for (II)]. In both forms, the N-H bonds are anti to the 3-chloro substituents of the aniline rings. In the crystal, inter-molecular N-H⋯O hydrogen bonds form C(4) chains along c. These chains are bolstered by weak C-H⋯O inter-actions that generate R(2) (1)(6) and R(2) (1)(7) ring motifs.
authors: Aamer
authors: A
authors: Saeed
authors: Muhammad
authors: M
authors: Arshad
authors: Jim
authors: J
authors: Simpson
references: Acta Crystallogr Sect E Struct Rep Online. 2010 Mar 24;66(Pt 4):o911-2
references: 21580722
references: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references: 19171970
references: Acta Crystallogr Sect E Struct Rep Online. 2008 Jan 16;64(Pt 2):o462
references: 21201488
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr Sect E Struct Rep Online. 2007 Dec 21;64(Pt 1):o340
references: 21200902
references: Acta Crystallogr Sect E Struct Rep Online. 2008 Jun 07;64(Pt 7):o1243
references: 21202878