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_4508389
_publ_section_title
;
 On the application of the organic barbiturates as NLO materials
;
_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         C12H9N2,C4H3N2O3,O
_chemical_formula_sum            'C16 H12 N4 O4'
_chemical_formula_weight         324.30
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                80.323(10)
_cell_angle_beta                 79.526(10)
_cell_angle_gamma                87.818(10)
_cell_formula_units_Z            2
_cell_length_a                   7.450(2)
_cell_length_b                   9.326(3)
_cell_length_c                   10.691(3)
_cell_measurement_temperature    300(2)
_cell_volume                     720.0(4)
_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      300(2)
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.975
_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  0.0672
_diffrn_reflns_av_sigmaI/netI    0.0725
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            6760
_diffrn_reflns_theta_full        25.21
_diffrn_reflns_theta_max         25.21
_diffrn_reflns_theta_min         1.96
_exptl_absorpt_coefficient_mu    0.111
_exptl_absorpt_correction_T_max  0.9507
_exptl_absorpt_correction_T_min  0.9455
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.496
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             336
_exptl_crystal_size_max          0.51
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.46
_refine_diff_density_max         0.511
_refine_diff_density_min         -0.278
_refine_diff_density_rms         0.086
_refine_ls_extinction_coef       0.081(14)
_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   1.137
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         2529
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.137
_refine_ls_R_factor_all          0.0809
_refine_ls_R_factor_gt           0.0588
_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^)+(0.1063P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1740
_refine_ls_wR_factor_ref         0.1941
_reflns_number_gt                1848
_reflns_number_total             2529
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            Struct-64.cif
_cod_data_source_block           bi64
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_database_code               4508389