7-(1,3-Dioxolan-2-ylmethyl)-1,3-dimethyl-3,7-dihydro-1<i>H</i>-purine-2,6-dione
Bing Tu; Zhan Shu; Xing-Jü Ma; Zhi-Min Jin; Acta Crystallographica Section E 63 (2007) o726–o727; doi:10.1107/S1600536806053906

data_2212333
_publ_section_title
7-(1,3-Dioxolan-2-ylmethyl)-1,3-dimethyl-3,7-dihydro-1<i>H</i>-purine-2,6-dione
_journal_coeditor_code           RN2017
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o726
_journal_page_last               o727
_journal_paper_doi               10.1107/S1600536806053906
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C11 H14 N4 O4'
_chemical_formula_moiety         'C11 H14 N4 O4'
_chemical_formula_sum            'C11 H14 N4 O4'
_chemical_formula_weight         266.26
_chemical_name_systematic
;
7-(1,3-Dioxolan-2-ylmethyl)-3,7-dihydro-1,3-dimethyl-1H-purine-2,6-dione
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 91.063(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.9163(15)
_cell_length_b                   20.753(6)
_cell_length_c                   11.772(4)
_cell_measurement_reflns_used    1494
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      24.12
_cell_measurement_theta_min      2.61
_cell_volume                     1200.9(6)
_computing_cell_refinement       'SAINT (Bruker, 2002)'
_computing_data_collection       'SMART (Bruker, 2002)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Bruker, 2002)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX area-detector'
_diffrn_measurement_method       '\f and \w'
_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  0.0281
_diffrn_reflns_av_sigmaI/netI    0.0412
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -3
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            6254
_diffrn_reflns_theta_full        25.14
_diffrn_reflns_theta_max         25.14
_diffrn_reflns_theta_min         1.96
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.114
_exptl_absorpt_correction_T_max  0.9814
_exptl_absorpt_correction_T_min  0.9600
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2002)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.473
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             560
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.379
_refine_diff_density_min         -0.230
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     174
_refine_ls_number_reflns         2140
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0820
_refine_ls_R_factor_gt           0.0627
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0737P)^2^+0.6926P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1554
_refine_ls_wR_factor_ref         0.1671
_reflns_number_gt                1642
_reflns_number_total             2140
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            rn2017.cif
_cod_data_source_block           I
_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 

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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2212333
_cod_database_fobs_code          2212333