N,N'-bis(3-Fluorophenyl)urea
Huth, Susanne L.; Threlfall, Terry L.; Hursthouse, Michael B.; Crystal Structure Report Archive  (2008) 686–; doi:

data_1519884
_publ_section_title
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 N,N'-bis(3-Fluorophenyl)urea
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_journal_name_full               'Crystal Structure Report Archive'
_journal_page_first              686
_journal_year                    2008
_chemical_formula_sum            'C13 H10 F2 N2 O'
_chemical_formula_weight         248.23
_chemical_name_systematic
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N,N'-bis(3-Fluorophenyl)urea
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 109.300(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   20.7183(7)
_cell_length_b                   12.6104(5)
_cell_length_c                   9.1726(3)
_cell_measurement_reflns_used    14167
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.91
_cell_volume                     2261.81(14)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_data_collection       'COLLECT (Hooft, R.W.W., 1998)'
_computing_data_reduction
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type
'Bruker-Nonius APEX II CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  '10cm confocal mirrors'
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0516
_diffrn_reflns_av_sigmaI/netI    0.0416
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            13299
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         3.23
_exptl_absorpt_coefficient_mu    0.117
_exptl_absorpt_correction_T_max  0.9977
_exptl_absorpt_correction_T_min  0.9702
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2007/2 (Sheldrick, G.M., 2007)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.458
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'cut lath'
_exptl_crystal_F_000             1024
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.245
_refine_diff_density_min         -0.226
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.107
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         2586
_refine_ls_number_restraints     17
_refine_ls_restrained_S_all      1.105
_refine_ls_R_factor_all          0.0835
_refine_ls_R_factor_gt           0.0595
_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0237P)^2^+5.0658P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1137
_refine_ls_wR_factor_ref         0.1270
_reflns_number_gt                1993
_reflns_number_total             2586
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            eCrystal-686.cif
_cod_data_source_block           2008lsh115
_cod_depositor_comments
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Citation :
Huth, Susanne L. and Threlfall, Terry L. and Hursthouse, Michael B. (2008) 
University of Southampton, Crystal Structure Report Archive. 
(doi:10.5258/ecrystals/686)

More at:
http://ecrystals.chem.soton.ac.uk/686/

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to the built-in table from CIF Core dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 3392 2015-05-12 13:50:21Z andrius 
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_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1519884