Bis(2,6-diaminopyridinium) oxalate dihydrate
Odabaşoğlu, Mustafa; Büyükgüngör, Orhan; Acta Crystallographica Section E 62 (2006) o4543–o4544; doi:10.1107/S160053680603755X

data_2210751
_publ_section_title
;
 Bis(2,6-diaminopyridinium) oxalate dihydrate
;
_journal_coeditor_code           OB3017
_journal_issue                   10
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o4543
_journal_page_last               o4544
_journal_paper_doi               10.1107/S160053680603755X
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          '2C5 H8 N3 +, C2 O4 2-, 2H2 O'
_chemical_formula_moiety         '2C5 H8 N3 +, C2 O4 2-, 2H2 O'
_chemical_formula_sum            'C12 H20 N6 O6'
_chemical_formula_weight         344.34
_chemical_name_systematic
;
Bis(2,6-diaminopyridinium) oxalate dihydrate
;
_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                 114.531(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.0068(6)
_cell_length_b                   15.4788(8)
_cell_length_c                   7.0250(5)
_cell_measurement_reflns_used    14420
_cell_measurement_temperature    296
_cell_measurement_theta_max      27.92
_cell_measurement_theta_min      2.63
_cell_volume                     792.06(10)
_computing_cell_refinement       X-AREA
_computing_data_collection       'X-AREA (Stoe & Cie, 2002)'
_computing_data_reduction        'X-RED32 (Stoe & Cie, 2002)'
_computing_molecular_graphics    'ORTEP-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      296
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Stoe IPDS-2'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0466
_diffrn_reflns_av_sigmaI/netI    0.0197
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            11192
_diffrn_reflns_theta_full        25.99
_diffrn_reflns_theta_max         25.99
_diffrn_reflns_theta_min         2.63
_diffrn_standards_decay_%        <2
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.117
_exptl_absorpt_correction_T_max  0.9714
_exptl_absorpt_correction_T_min  0.9357
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   '(X-RED32; Stoe & Cie, 2002)'
_exptl_crystal_colour            'light yellow'
_exptl_crystal_density_diffrn    1.444
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             364
_exptl_crystal_size_max          0.65
_exptl_crystal_size_mid          0.44
_exptl_crystal_size_min          0.28
_refine_diff_density_max         0.154
_refine_diff_density_min         -0.138
_refine_ls_extinction_coef       0.034(5)
_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   1.029
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     150
_refine_ls_number_reflns         1551
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0355
_refine_ls_R_factor_gt           0.0317
_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^)+(0.0479P)^2^+0.1298P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0856
_refine_ls_wR_factor_ref         0.0885
_reflns_number_gt                1401
_reflns_number_total             1551
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ob3017.cif
_cod_data_source_block           I
_cod_original_cell_volume        792.06(9)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2210751
_cod_database_fobs_code          2210751