Received 22 January 2013
aLake Braddock Secondary School, 9200 Burke Lake Road, Burke, VA 22015, USA,bDepartment of Chemistry, Howard University, 525 College Street NW, Washington DC 20059, USA,cDepartment of Studies in Chemistry, Mangalore University, Mangalagangotri 574 199, India, and dDepartment of Studies in Chemistry, University of Mysore, Manasagangotri, Mysore 570 006, India
Correspondence e-mail: email@example.com
In the title compound, C19H17Cl2N3O2, there are three molecules (A, B and C) in the asymmetric unit and each differs in the conformation adopted. As a result of steric repulsion, the amide group is rotated with respect to both the dichlorophenyl and 2,3-dihydro-1H-pyrazol-4-yl rings, making dihedral angles of 44.5 (2) and 56.2 (2)°, respectively in A, 51.1 (2) and 54.1 (2)° in B, and 53.8 (2) and 54.6 (2)° in C. The dihedral angles between the dichlorophenyl and 2,3-dihydro-1H-pyrazol-4-yl rings are 54.8 (2), 76.2 (2) and 77.5 (2)° in molecules A, B and C, respectively, while the 2,3-dihydro-1H-pyrazol-4-yl and phenyl rings make dihedral angles of 45.3 (2), 51.2 (2) and 42.8 (2)°, respectively. In the crystal, two of the molecules are linked through N-HO hydrogen bonding to an adjoining molecule, forming dimers of the R22(10) type, while the third molecule forms such dimers with itself. C-HO interactions link the dimers.
For graph-set description of hydrogen-bonding patterns, see: Bernstein et al. (1995). For related structures, see: Fun et al. (2011a,b, 2012a,b). For similar structures but with differing dichloro substitution, see: Butcher et al. (2013a,b). For a description of the Cambridge Structural Database, see: Allen (2002). For the biological activity of N-substituted 2-arylacetamides, see: Mijin & Marinkovic (2006); Mijin et al. (2008). For the coordination abilities of amides, see: Wu et al. (2008, 2010).
Data collection: CrysAlis PRO (Agilent, 2011); cell refinement: CrysAlis PRO; data reduction: CrysAlis PRO; 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.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HG5286 ).
RJB acknowledges the NSF-MRI program (grant No. CHE-0619278) for funds to purchase the diffractometer.
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