Solid–gas reactions between 1,3-dimethylbarbituric acid and amines. A structural and spectroscopic study
Braga, Dario; Cadoni, Marcella; Grepioni, Fabrizia; Maini, Lucia; van de Streek, Jacco; New Journal of Chemistry 31 (2007) 1935–; doi:10.1039/b704772j

data_7052199
_publ_section_title
;
 Solid--gas reactions between 1,3-dimethylbarbituric acid and amines. A
 structural and spectroscopic study
;
_journal_issue                   11
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              1935
_journal_paper_doi               10.1039/b704772j
_journal_volume                  31
_journal_year                    2007
_chemical_formula_sum            'C14 H24 N6 O6'
_chemical_formula_weight         372.39
_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                 95.17
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.290(5)
_cell_length_b                   19.761(6)
_cell_length_c                   8.300(3)
_cell_measurement_temperature    293(2)
_cell_volume                     1844.2(12)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0535
_diffrn_reflns_av_sigmaI/netI    0.0657
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1747
_diffrn_reflns_theta_full        24.98
_diffrn_reflns_theta_max         24.98
_diffrn_reflns_theta_min         3.10
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.341
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.280
_refine_diff_density_min         -0.277
_refine_diff_density_rms         0.066
_refine_ls_extinction_coef       0.008(2)
_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   0.957
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     125
_refine_ls_number_reflns         1626
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.957
_refine_ls_R_factor_all          0.1389
_refine_ls_R_factor_gt           0.0583
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1348P)^2^+0.5265P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1588
_refine_ls_wR_factor_ref         0.2106
_reflns_number_gt                807
_reflns_number_total             1626
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b704772j.txt
_cod_data_source_block           2b
_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               7052199