From molecular crystals to salt co-crystals of barbituric acid via the carbonate ion and an improvement of the solid state properties
Chierotti, Michele R.; Gaglioti, Katia; Gobetto, Roberto; Braga, Dario; Grepioni, Fabrizia; Maini, Lucia; CrystEngComm 15 (2013) 7598–; doi:10.1039/c3ce40938d

data_7210921
_publ_section_title
;
 From molecular crystals to salt co-crystals of barbituric acid via the
 carbonate ion and an improvement of the solid state properties
;
_journal_issue                   37
_journal_name_full               CrystEngComm
_journal_page_first              7598
_journal_paper_doi               10.1039/c3ce40938d
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         'K1 C4 H3 N2 O3, C4 H4 N2 O3,2(H2 O)'
_chemical_formula_sum            'C8 H11 K N4 O8'
_chemical_formula_weight         330.31
_chemical_name_common            BA_KBA_2H2O
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 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                 91.880(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            24
_cell_length_a                   51.935(7)
_cell_length_b                   11.828(3)
_cell_length_c                   12.781(3)
_cell_measurement_reflns_used    2968
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.9282
_cell_measurement_theta_min      2.7413
_cell_volume                     7847(3)
_computing_cell_refinement
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.44 (release 25-10-2010 CrysAlis171 .NET)
(compiled Oct 25 2010,18:11:34)
;
_computing_data_collection
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.44 (release 25-10-2010 CrysAlis171 .NET)
(compiled Oct 25 2010,18:11:34)
;
_computing_data_reduction
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.44 (release 25-10-2010 CrysAlis171 .NET)
(compiled Oct 25 2010,18:11:34)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 16.1340
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.867
_diffrn_measurement_device_type  'Xcalibur, Sapphire3'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0289
_diffrn_reflns_av_sigmaI/netI    0.0286
_diffrn_reflns_limit_h_max       66
_diffrn_reflns_limit_h_min       -64
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            30072
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         28.99
_diffrn_reflns_theta_min         3.03
_exptl_absorpt_coefficient_mu    0.455
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.49095
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.44 (release 25-10-2010 CrysAlis171 .NET)
(compiled Oct 25 2010,18:11:34)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.678
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             4080
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.18
_refine_diff_density_max         1.791
_refine_diff_density_min         -0.407
_refine_diff_density_rms         0.098
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     617
_refine_ls_number_reflns         9044
_refine_ls_number_restraints     16
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0729
_refine_ls_R_factor_gt           0.0593
_refine_ls_shift/su_max          0.085
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0855P)^2^+18.4059P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1687
_refine_ls_wR_factor_ref         0.1791
_reflns_number_gt                7422
_reflns_number_total             9044
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c3ce40938d.txt
_cod_data_source_block           move_BA_KBA_2H2O
_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 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7210921