6-Amino-3-methyl-5-nitrosopyrimidine-2,4(1<i>H</i>,3<i>H</i>)-dione forms a three-dimensional hydrogen-bonded framework structure
Godino Salido, M. Luz; Gutiérrez Valero, M. Dolores; Low, John N.; Glidewell, Christopher; Acta Crystallographica Section C 59 (2003) o340–o342; doi:10.1107/S0108270103009302

data_2013371
_publ_section_title
;
 6-Amino-3-methyl-5-nitrosopyrimidine-2,4(1<i>H</i>,3<i>H</i>)-dione
 forms a three-dimensional hydrogen-bonded framework structure
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o340
_journal_page_last               o342
_journal_paper_doi               10.1107/S0108270103009302
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac          'C5 H6 N4 O3'
_chemical_formula_moiety         'C5 H6 N4 O3'
_chemical_formula_sum            'C5 H6 N4 O3'
_chemical_formula_weight         170.14
_chemical_name_systematic
;
6-Amino-3-methyl-5-nitrosopyrimidine-2,4(1H,3H)-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
_cell_angle_alpha                90.00
_cell_angle_beta                 102.665(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   4.9634(3)
_cell_length_b                   11.1829(9)
_cell_length_c                   11.7960(8)
_cell_measurement_reflns_used    1399
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.44
_cell_measurement_theta_min      3.54
_cell_volume                     638.81(8)
_computing_cell_refinement       'DENZO--SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'KappaCCD Server Software (Nonius, 1997)'
_computing_data_reduction        DENZO--SMN
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL97 and PRPKAPPA (Ferguson, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.957
_diffrn_measured_fraction_theta_max 0.957
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '\f scans, and \w scans with \k offsets'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.040
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_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            4417
_diffrn_reflns_theta_full        27.44
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         3.54
_diffrn_standards_decay_%        negligible
_exptl_absorpt_coefficient_mu    0.148
_exptl_absorpt_correction_T_max  0.991
_exptl_absorpt_correction_T_min  0.972
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(DENZO--SMN; Otwinowski & Minor, 1997)'
_exptl_crystal_colour            pink
_exptl_crystal_density_diffrn    1.769
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             352
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.06
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_refine_diff_density_min         -0.367
_refine_ls_extinction_method     none
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_refine_ls_matrix_type           full
_refine_ls_number_parameters     110
_refine_ls_number_reflns         1399
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0589
_refine_ls_R_factor_gt           0.0447
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0702P)^2^+0.0762P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1108
_refine_ls_wR_factor_ref         0.1180
_reflns_number_gt                1106
_reflns_number_total             1399
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1637.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' 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               2013371
_cod_database_fobs_code          2013371