Hydrogen-bonding patterns in 2-amino-4,6-dimethylpyrimidinium hydrogen sulfate
Madhukar Hemamalini; Packianathan Thomas Muthiah; Urszula Rychlewska; Agnieszka Plutecka; Acta Crystallographica Section C 61 (2005) o95–o97; doi:10.1107/S0108270104030975

data_2014713
_publ_section_title
;
 Hydrogen-bonding patterns in 2-amino-4,6-dimethylpyrimidinium hydrogen
 sulfate
;
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o95
_journal_page_last               o97
_journal_paper_doi               10.1107/S0108270104030975
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C6 H10 N3 +, H1 S1 O4 -'
_chemical_formula_moiety         'C6 H10 N3 +, H1 O4 S1 -'
_chemical_formula_sum            'C6 H11 N3 O4 S'
_chemical_formula_weight         221.24
_chemical_name_common
'2-amino-4,6-dimethylpyrimidinium hydrogensulfate'
_chemical_name_systematic
;
2-amino-4,6-dimethylpyrimidinium hydrogen sulfate
;
_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   Fmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.27(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.0250(10)
_cell_length_b                   6.7240(10)
_cell_length_c                   20.200(4)
_cell_measurement_reflns_used    4591
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.7
_cell_measurement_theta_min      3.4
_cell_volume                     954.2(3)
_computing_cell_refinement       'CrysAlis RED (Oxford Diffraction, 2004)'
_computing_data_collection       'CrysAlis CCD (Oxford Diffraction, 2004)'
_computing_data_reduction        'CrysAlis RED'
_computing_molecular_graphics
'PLATON (Spek, 2003) and ORTEPII (Johnson, 1976)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      130(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Kuma KM-4 CCD \k-geometry diffractometer'
_diffrn_measurement_method       '\w scans'
_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  0.0255
_diffrn_reflns_av_sigmaI/netI    0.0189
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            7253
_diffrn_reflns_theta_full        25.67
_diffrn_reflns_theta_max         25.67
_diffrn_reflns_theta_min         4.65
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count '50 dc frames'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.334
_exptl_absorpt_correction_T_max  0.970
_exptl_absorpt_correction_T_min  0.877
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(XEMP; Siemens, 1990)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.540
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             464
_exptl_crystal_size_max          0.5
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.238
_refine_diff_density_min         -0.512
_refine_ls_extinction_coef       0.015(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   1.073
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     172
_refine_ls_number_reflns         1793
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0310
_refine_ls_R_factor_gt           0.0268
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0395P)^2^+0.4073P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0701
_refine_ls_wR_factor_ref         0.0723
_reflns_number_gt                1622
_reflns_number_total             1793
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ob1206.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_Hall     '-p 2ybc'
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2014713
_cod_database_fobs_code          2014713