Actual and virtual structures in molecular crystals
Causà, Mauro; Centore, Roberto; CrystEngComm 19 (2017) 1320–; doi:10.1039/C7CE00075H

data_7227612
_publ_section_title
;
 Actual and virtual structures in molecular crystals
;
_journal_issue                   9
_journal_name_full               CrystEngComm
_journal_page_first              1320
_journal_paper_doi               10.1039/C7CE00075H
_journal_volume                  19
_journal_year                    2017
_chemical_formula_moiety         'C7 H8 N4 O2'
_chemical_formula_sum            'C7 H8 N4 O2'
_chemical_formula_weight         180.17
_chemical_melting_point          471
_chemical_name_systematic
;
 N-(nicotinoamido)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
_audit_update_record
;
2016-11-13 deposited with the CCDC.
2017-02-01 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 91.18(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.580(2)
_cell_length_b                   9.633(3)
_cell_length_c                   19.017(5)
_cell_measurement_reflns_used    185
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      23.165
_cell_measurement_theta_min      3.725
_cell_volume                     838.8(5)
_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      173(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 0.975
_diffrn_measured_fraction_theta_max 0.975
_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  0.0406
_diffrn_reflns_av_sigmaI/netI    0.0472
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            6862
_diffrn_reflns_theta_full        27.55
_diffrn_reflns_theta_max         27.55
_diffrn_reflns_theta_min         3.85
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_T_max  0.9913
_exptl_absorpt_correction_T_min  0.9474
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 SADABS (Bruker, 2000)
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.427
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             376
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: ethanol'
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.239
_refine_diff_density_min         -0.235
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.083
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     130
_refine_ls_number_reflns         1878
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.083
_refine_ls_R_factor_all          0.0777
_refine_ls_R_factor_gt           0.0460
_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^)+(0.0406P)^2^+0.3540P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0981
_refine_ls_wR_factor_ref         0.1099
_reflns_number_gt                1325
_reflns_number_total             1878
_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            c7ce00075h2.cif
_cod_data_source_block           smcbznico_lt
_cod_depositor_comments
'Adding full bibliography for 7227611--7227612.cif.'
_cod_database_code               7227612