Bis(<i>N</i>,<i>N</i>'-diphenylguanidinium) oxalate
Paixão, J. A.; Matos Beja, A.; Ramos Silva, M.; Alte da Veiga, L.; Acta Crystallographica Section C 55 (1999) 1290–1292; doi:10.1107/S010827019900493X

data_2008850
_publ_section_title
;
 Bis(<i>N</i>,<i>N</i>'-diphenylguanidinium) oxalate
;
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              1290
_journal_page_last               1292
_journal_paper_doi               10.1107/S010827019900493X
_journal_volume                  55
_journal_year                    1999
_chemical_formula_moiety         '2C13 H14 N3 1+ , C2 O4  2-'
_chemical_formula_sum            'C28 H28 N6 O4'
_chemical_formula_weight         512.56
_chemical_name_systematic
;
 bis(N,N'-diphenylguanidinium) oxalate
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_audit_creation_method           SHELXL97
_cell_angle_alpha                90.00
_cell_angle_beta                 106.59(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   19.784(9)
_cell_length_b                   11.101(9)
_cell_length_c                   12.384(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      15.38
_cell_measurement_theta_min      10.20
_cell_volume                     2607(3)
_computing_cell_refinement       'CAD-4 Software'
_computing_data_collection       'CAD-4 Software (Enraf-Nonius, 1989)'
_computing_data_reduction        'SDP-Plus (Frenz, 1985)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1976)'
_computing_publication_material  SHELXL97
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.895
_diffrn_measured_fraction_theta_max 0.895
_diffrn_measurement_device_type  'Enraf-Nonius CAD-4'
_diffrn_measurement_method       'profile data from \w-2\q 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  0.017
_diffrn_reflns_av_sigmaI/netI    0.033
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2918
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.5
_diffrn_reflns_theta_min         2.13
_diffrn_standards_decay_%        5.8
_diffrn_standards_interval_time  180
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.090
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.306
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1080
_exptl_crystal_size_max          0.25
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.162
_refine_diff_density_min         -0.136
_refine_ls_extinction_coef       0.0038(4)
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 1997)'
_refine_ls_goodness_of_fit_ref   1.017
_refine_ls_hydrogen_treatment    refxyz
_refine_ls_matrix_type           full
_refine_ls_number_parameters     215
_refine_ls_number_reflns         2682
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.087
_refine_ls_R_factor_gt           0.035
_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^)+(0.0405P)^2^+0.9201P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.095
_reflns_number_gt                1688
_reflns_number_total             2682
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            sk1285.cif
_cod_data_source_block           dpgox
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2008850
_cod_database_fobs_code          2008850