Crystal Structures ofN-Aryl-N'-4-Nitrophenyl Ureas: Molecular Conformation and Weak Interactions Direct the Strong Hydrogen Bond Synthon
Reddy, L. Sreenivas; Chandran, Sreekanth K.; George, Sumod; Babu, N. Jagadeesh; Nangia, Ashwini; Crystal Growth & Design 7 (2007) 2675–2690; doi:10.1021/cg070155j

data_4504247
_publ_section_title
;
 Crystal Structures ofN-Aryl-N'-4-Nitrophenyl Ureas: Molecular Conformation
 and Weak Interactions Direct the Strong Hydrogen Bond Synthon
;
_journal_coden_ASTM              CGDEFU
_journal_issue                   12
_journal_name_full               'Crystal Growth & Design'
_journal_page_first              2675
_journal_page_last               2690
_journal_paper_doi               10.1021/cg070155j
_journal_volume                  7
_journal_year                    2007
_chemical_formula_moiety         'C14 H10 N4 O3'
_chemical_formula_sum            'C14 H10 N4 O3'
_chemical_formula_weight         282.26
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.517(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.919(4)
_cell_length_b                   13.692(6)
_cell_length_c                   11.777(6)
_cell_measurement_temperature    293(2)
_cell_volume                     1273.0(11)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.980
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0317
_diffrn_reflns_av_sigmaI/netI    0.0500
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            5981
_diffrn_reflns_theta_full        28.08
_diffrn_reflns_theta_max         28.08
_diffrn_reflns_theta_min         2.29
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_T_max  0.9740
_exptl_absorpt_correction_T_min  0.9325
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.473
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.66
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.230
_refine_diff_density_min         -0.164
_refine_diff_density_rms         0.046
_refine_ls_extinction_coef       0.0032(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.971
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         3037
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.971
_refine_ls_R_factor_all          0.0970
_refine_ls_R_factor_gt           0.0501
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0748P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1361
_refine_ls_wR_factor_ref         0.1527
_reflns_number_gt                1606
_reflns_number_total             3037
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg070155j-file006.cif
_cod_data_source_block           5.4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1272.9(10)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4504247