In the title compound C19H13ClN2 the dihedral angle formed by the imidazole core with the chloro-phenyl and phenyl rings are 24. refinement: (Bruker 2009 ?); data reduction: (Sheldrick 2008 ?); plan(s) utilized to refine framework: (Nardelli 1995 ?) and (Spek 2009 ?). Supplementary Materials Crystal framework: includes datablock(s) global I. DOI: 10.1107/S1600536812006678/bh2413sup1.cif Just click here to see.(23K cif) Framework Letrozole elements: contains datablock(s) I. DOI: 10.1107/S1600536812006678/bh2413Isup2.hkl Just click here to see.(264K hkl) Supplementary materials document. DOI: 10.1107/S1600536812006678/bh2413Isup3.cml Extra supplementary components: crystallographic details; 3D watch; checkCIF survey Acknowledgments The writers give thanks to the Ministry of ADVANCED SCHOOLING of Malaysia Universiti Teknologi MARA for the Youthful Lecture System and the study grants or loans Nos. 600-RMI/ST/FRGS and 5/3/Fst(47/2010). supplementary crystallographic details Comment Benzimidazoles derivatives display wide interest specifically in areas as biological substances (Velík = 304.76= 8.2981 (1) ?θ = 2.1-32.7°= 9.2963 (2) ?μ = 0.26 mm?1= 20.7796 (3) ?= 293 Kβ = 112.815 (1)°Slab brown= 1477.56 (4) ?30.48 × 0.39 × 0.18 mm= 4 Notice in another window Data collection Bruker APEX DUO CCD area-detector diffractometer5398 independent reflectionsRadiation supply: fine-focus covered pipe4610 reflections with > 2σ(= ?9→12Absorption correction: multi-scan (= ?13→14= ?31→3133103 measured reflections Notice in another window Refinement Eng Refinement on = 1.04= 1/[σ2(= (Fo2 + 2Fc2)/35398 reflections(Δ/σ)max = 0.001199 parametersΔρmax = 0.49 e ??30 Letrozole restraintsΔρmin = ?0.28 e ??30 constraints Notice in another screen Fractional atomic coordinates and Letrozole equal or isotropic isotropic displacement variables (?2) xconzUiso*/UeqCl10.72432 (4)?0.07747 (3)?0.201084 (13)0.02762 (8)N10.15677 (11)0.13941 (9)?0.51877 (4)0.01712 (15)N20.19862 (10)?0.08273 (8)?0.55312 (4)0.01549 (15)C10.49136 (12)?0.11517 (11)?0.40861 (5)0.01843 (17)H1B0.5057?0.1695?0.44360.022*C20.60543 (13)?0.13482 (11)?0.33949 (5)0.02010 (18)H2A0.6952?0.2021?0.32810.024*C30.58327 (13)?0.05256 (11)?0.28778 (5)0.01930 (18)C40.45136 (13)0.05008 (11)?0.30385 (5)0.01991 (18)H4A0.43930.1057?0.26880.024*C50.33807 (13)0.06833 (10)?0.37285 (5)0.01777 (17)H5A0.24940.1366?0.38400.021*C60.35547 (12)?0.01485 (10)?0.42611 (5)0.01522 (16)C70.23567 (12)0.01388 (10)?0.49847 (5)0.01518 (16)C80.06201 (12)0.12524 (10)?0.59018 (5)0.01704 (17)C9?0.04641 (13)0.22408 (11)?0.63856 (5)0.02113 (19)H9A?0.06580.3155?0.62480.025*C10?0.12370 (13)0.18085 (12)?0.70759 (6)0.0235 (2)H10A?0.19650.2445?0.74060.028*C11?0.09486 (14)0.04291 (12)?0.72905 (5)0.0232 (2)H11A?0.14740.0183?0.77600.028*C120.00988 (13)?0.05700 (11)?0.68185 (5)0.02010 (18)H12A0.0277?0.1488?0.69560.024*C130.08723 (12)?0.01221 (10)?0.61242 (5)0.01645 (16)C140.23702 (12)?0.23309 (10)?0.55279 (5)0.01539 (16)C150.33740 (12)?0.28012 (11)?0.58889 (5)0.01818 (17)H15A0.3838?0.2146?0.61090.022*C160.36742 (13)?0.42709 (11)?0.59159 (5)0.02123 (19)H16A0.4343?0.4601?0.61550.025*C170.29783 (13)?0.52407 (11)?0.55872 (6)0.0221 (2)H17A0.3173?0.6221?0.56110.027*C180.19916 (14)?0.47574 (11)?0.52227 (6)0.0226 (2)H18A0.1546?0.5413?0.49960.027*C190.16673 (13)?0.32917 (11)?0.51960 (5)0.01932 (18)H19A0.0990?0.2963?0.49590.023* Notice in another screen Atomic displacement variables (?2) U11U22U33U12U13U23Cl10.03461 (15)0.02418 (13)0.01779 (12)?0.00362 (10)0.00329 (10)0.00170 (8)N10.0187 (3)0.0134 (3)0.0199 (4)0.0005 (3)0.0082 Letrozole (3)?0.0005 (3)N20.0178 (3)0.0120 (3)0.0166 (3)?0.0001 (3)0.0067 (3)?0.0015 (3)C10.0184 (4)0.0169 (4)0.0200 (4)0.0007 (3)0.0075 (3)?0.0019 (3)C20.0195 (4)0.0176 (4)0.0213 (4)0.0002 (3)0.0060 (3)?0.0005 (3)C30.0219 (4)0.0177 (4)0.0170 (4)?0.0043 (3)0.0061 (3)0.0005 (3)C40.0244 (4)0.0187 (4)0.0185 (4)?0.0033 (3)0.0103 (3)?0.0031 Letrozole (3)C50.0190 (4)0.0155 (4)0.0204 (4)?0.0011 (3)0.0094 (3)?0.0024 (3)C60.0160 (4)0.0130 (4)0.0176 (4)?0.0020 (3)0.0076 (3)?0.0013 (3)C70.0162 (4)0.0130 (4)0.0178 (4)?0.0010 (3)0.0082 (3)?0.0018 (3)C80.0174 (4)0.0149 (4)0.0195 (4)?0.0005 (3)0.0080 (3)0.0009 (3)C90.0217 (4)0.0173 (4)0.0248 (5)0.0015 (3)0.0096 (4)0.0044 (3)C100.0218 (4)0.0256 (5)0.0222 (5)0.0014 (4)0.0077 (4)0.0076 (4)C110.0222 (4)0.0286 (5)0.0178 (4)?0.0015 (4)0.0066 (3)0.0018 (4)C120.0201 (4)0.0216 (4)0.0186 (4)?0.0015.