Orthogonal H-bonding synthons, actual and virtual structures in molecular crystals: a case study
Centore, Roberto; Causà, Mauro; Cerciello, Francesca; Capone, Fabio; Fusco, Sandra; CrystEngComm 16 (2014) 9168–; doi:10.1039/C4CE00956H

data_7216652
_publ_section_title
;
 Orthogonal H-bonding synthons, actual and virtual structures in molecular
 crystals: a case study
;
_journal_issue                   39
_journal_name_full               CrystEngComm
_journal_page_first              9168
_journal_paper_doi               10.1039/C4CE00956H
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C8 H8 N4 O4'
_chemical_formula_sum            'C8 H8 N4 O4'
_chemical_formula_weight         224.18
_chemical_name_systematic
;
 N-(4-nitrophenylbenzamido)urea
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 108.39(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.524(3)
_cell_length_b                   23.583(7)
_cell_length_c                   9.537(4)
_cell_measurement_reflns_used    150
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      21.70
_cell_measurement_theta_min      3.75
_cell_volume                     965.5(8)
_computing_cell_refinement
;
Dirax/lsq (Duisenberg et al., 2000)
;
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
;
EvalCCD (Duisenberg & Schreurs 1990-2000)
;
_computing_molecular_graphics
;
Ortep-3 for Windows (Farrugia, 1997) and 
Mercury (Macrae <i>et al.</i>, 2006)
;
_computing_publication_material  'WinGX (Farrugia, 2012)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR97 (Altomare at al, 1999)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 9
_diffrn_detector_type
;
Bruker-Nonius 95mm CCD camera on \k-goniostat
;
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'Bruker-Nonius KappaCCD'
_diffrn_measurement_method
;
CCD rotation images, thick slices
;
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0314
_diffrn_reflns_av_sigmaI/netI    0.0302
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       30
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            10086
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         3.43
_exptl_absorpt_coefficient_mu    0.127
_exptl_absorpt_correction_T_max  0.9875
_exptl_absorpt_correction_T_min  0.9511
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 SADABS (Bruker, 2000)
;
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.542
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             464
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.150
_refine_diff_density_min         -0.267
_refine_diff_density_rms         0.036
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     157
_refine_ls_number_reflns         2181
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0840
_refine_ls_R_factor_gt           0.0490
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0456P)^2^+0.3624P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1047
_refine_ls_wR_factor_ref         0.1210
_reflns_number_gt                1452
_reflns_number_total             2181
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            c4ce00956h21.cif
_cod_data_source_block           smc11
_cod_depositor_comments
'Adding full bibliography for 7216651--7216656.cif.'
_cod_database_code               7216652