On the application of the organic barbiturates as NLO materials
Ivanova, Bojidarka; Spiteller, Michael; Crystal Growth and Design 10 (2010) 2470–2474; doi:10.1021/cg100284r

data_4508387
_publ_section_title
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 On the application of the organic barbiturates as NLO materials
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_journal_name_full               'Crystal Growth and Design'
_journal_page_first              2470
_journal_page_last               2474
_journal_paper_doi               10.1021/cg100284r
_journal_volume                  10
_journal_year                    2010
_chemical_formula_moiety         'C8 H6 N4 O6, 2(C9 H9 N2), O'
_chemical_formula_sum            'C26 H24 N8 O7'
_chemical_formula_weight         560.53
_space_group_IT_number           13
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yc'
_symmetry_space_group_name_H-M   'P 1 2/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                 112.66(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.142(4)
_cell_length_b                   7.283(4)
_cell_length_c                   19.288(7)
_cell_measurement_temperature    293(2)
_cell_volume                     1314.7(10)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker GIS'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker APEX2'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.916
_diffrn_measured_fraction_theta_max 0.916
_diffrn_measurement_device_type  'Bruker SMART X2S'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  'doubly curved silicon crystal'
_diffrn_radiation_source         'micro-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1643
_diffrn_reflns_av_sigmaI/netI    0.1548
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            4028
_diffrn_reflns_theta_full        25.06
_diffrn_reflns_theta_max         25.06
_diffrn_reflns_theta_min         2.80
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  0.9901
_exptl_absorpt_correction_T_min  0.9700
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.416
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.359
_refine_diff_density_min         -0.411
_refine_diff_density_rms         0.067
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.860
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     186
_refine_ls_number_reflns         2139
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.860
_refine_ls_R_factor_all          0.1389
_refine_ls_R_factor_gt           0.0766
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1140P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2029
_refine_ls_wR_factor_ref         0.2389
_reflns_number_gt                1004
_reflns_number_total             2139
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            Struct-31.cif
_cod_data_source_block           bi31a
_cod_depositor_comments
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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 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      'P 2/c'
_cod_database_code               4508387