1,3-Bis(4-methylbenzyl)pyrimidine-2,4(1<i>H</i>,3<i>H</i>)-dione
Li, Gong-Chun; Song, Xiao-Ping; Zhang, Li-Ke; Cui, Jiao-Jiao; Yang, Feng-Ling; Acta Crystallographica Section E 66 (2010) o193–; doi:10.1107/S1600536809053586

data_2224606
_publ_section_title
;
 1,3-Bis(4-methylbenzyl)pyrimidine-2,4(1<i>H</i>,3<i>H</i>)-dione
;
_journal_coeditor_code           CV2673
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o193
_journal_paper_doi               10.1107/S1600536809053586
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C20 H20 N2 O2'
_chemical_formula_moiety         'C20 H20 N2 O2'
_chemical_formula_sum            'C20 H20 N2 O2'
_chemical_formula_weight         320.38
_chemical_name_systematic
;
1,3-Bis(4-methylbenzyl)pyrimidine-2,4(1<i>H</i>,3<i>H</i>)-dione
;
_space_group_IT_number           2
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_symmetry_space_group_name_Hall  '-P 1'
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_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                66.25(3)
_cell_angle_beta                 80.79(3)
_cell_angle_gamma                71.18(3)
_cell_formula_units_Z            2
_cell_length_a                   9.4182(19)
_cell_length_b                   10.102(2)
_cell_length_c                   10.448(2)
_cell_measurement_reflns_used    2459
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.9123
_cell_measurement_theta_min      2.1308
_cell_volume                     860.7(4)
_computing_cell_refinement       'CrystalClear (Rigaku/MSC, 2006)'
_computing_data_collection       'CrystalClear (Rigaku/MSC, 2006)'
_computing_data_reduction        'CrystalClear (Rigaku/MSC, 2006)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Rigaku Saturn CCD area-detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
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_diffrn_reflns_limit_k_max       12
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_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
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_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.13
_exptl_absorpt_coefficient_mu    0.081
_exptl_absorpt_correction_T_max  0.9841
_exptl_absorpt_correction_T_min  0.9841
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(CrystalClear; Rigaku/MSC, 2006)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.236
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
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_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0409P)^2^+0.3734P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
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_reflns_threshold_expression     I>2sigma(I)
_cod_data_source_file            cv2673.cif
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_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        860.7(3)
_cod_database_code               2224606
_cod_database_fobs_code          2224606