4-Amino-2,6-dimethoxypyrimidine: hydrogen-bonded sheets of <i>R</i>~2~^2^(8) and <i>R</i>~6~^6^(28) rings, reinforced by an aromatic π–π-stacking interaction
Glidewell, Christopher; Low, John N.; Melguizo, Manuel; Quesada, Antonio; Acta Crystallographica Section C 59 (2003) o202–o204; doi:10.1107/S010827010300547X

data_2013361
_publ_section_title
;
 4-Amino-2,6-dimethoxypyrimidine: hydrogen-bonded sheets of
 <i>R</i>~2~^2^(8) and <i>R</i>~6~^6^(28) rings, reinforced by an
 aromatic \p--\p-stacking interaction
;
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o202
_journal_page_last               o204
_journal_paper_doi               10.1107/S010827010300547X
_journal_volume                  59
_journal_year                    2003
_chemical_formula_iupac          'C6 H9 N3 O2'
_chemical_formula_moiety         'C6 H9 N3 O2'
_chemical_formula_sum            'C6 H9 N3 O2'
_chemical_formula_weight         155.16
_chemical_name_systematic
;
4-Amino-2,6-dimethoxypyrimidine
;
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   13.5867(6)
_cell_length_b                   7.8621(2)
_cell_length_c                   13.9932(6)
_cell_measurement_reflns_used    1703
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.44
_cell_measurement_theta_min      2.91
_cell_volume                     1494.75(10)
_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 0.995
_diffrn_measured_fraction_theta_max 0.995
_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  0.0811
_diffrn_reflns_av_sigmaI/netI    0.0549
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            13259
_diffrn_reflns_theta_full        27.44
_diffrn_reflns_theta_max         27.44
_diffrn_reflns_theta_min         2.91
_diffrn_standards_decay_%        negligible
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  0.995
_exptl_absorpt_correction_T_min  0.968
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(DENZO-SMN; Otwinowski & Minor, 1997)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.379
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.215
_refine_diff_density_min         -0.221
_refine_ls_extinction_coef       0.010(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.050
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     103
_refine_ls_number_reflns         1703
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0945
_refine_ls_R_factor_gt           0.0470
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0626P)^2^+0.1218P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1094
_refine_ls_wR_factor_ref         0.1253
_reflns_number_gt                1056
_reflns_number_total             1703
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1625.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 
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_cod_database_code               2013361
_cod_database_fobs_code          2013361