Picolinamidium squarate and di-<i>p</i>-toluidinium squarate dihydrate
Uçar, İbrahim; Bulut, Ahmet; Yeşilel, Okan Zafer; Büyükgüngör, Orhan; Acta Crystallographica Section C 60 (2004) o585–o588; doi:10.1107/S0108270104013964

data_2014163
_publ_section_title
;
 Picolinamidium squarate and di-<i>p</i>-toluidinium squarate dihydrate
;
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o585
_journal_page_last               o588
_journal_paper_doi               10.1107/S0108270104013964
_journal_volume                  60
_journal_year                    2004
_chemical_formula_iupac          '2C7 H10 N +, C4 O4 2-, 2H2 O'
_chemical_formula_moiety         '2C7 H10 N +, C4 O4 2-, 2H2 O'
_chemical_formula_sum            'C18 H24 N2 O6'
_chemical_formula_weight         364.40
_chemical_name_systematic        ?
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.761(5)
_cell_length_b                   22.288(5)
_cell_length_c                   10.684(5)
_cell_measurement_reflns_used    7934
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.71
_cell_measurement_theta_min      1.83
_cell_volume                     1848.1(15)
_computing_cell_refinement       X-AREA
_computing_data_collection       'X-AREA (Stoe & Cie, 2001)'
_computing_data_reduction        'X-RED32 (Stoe & Cie, 2001)'
_computing_molecular_graphics    'ORTEPIII (Burnett & Johnson, 1996)'
_computing_publication_material  'WinGX  (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'STOE IPDS-II'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0847
_diffrn_reflns_av_sigmaI/netI    0.0480
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            21375
_diffrn_reflns_theta_full        27.95
_diffrn_reflns_theta_max         27.95
_diffrn_reflns_theta_min         1.83
_diffrn_standards_interval_count 0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_type   none
_exptl_absorpt_process_details   '(X-RED32; Stoe & Cie, 2002)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.310
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             776
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.141
_refine_diff_density_min         -0.123
_refine_ls_extinction_coef       0.026(3)
_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   0.835
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     140
_refine_ls_number_reflns         2208
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.316
_refine_ls_R_factor_all          0.0806
_refine_ls_R_factor_gt           0.0368
_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^)+(0.0604P)^2^] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0823
_refine_ls_wR_factor_ref         0.0939
_reflns_number_gt                1219
_reflns_number_total             2208
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ga1062.cif
_cod_data_source_block           II
_cod_database_code               2014163
_cod_database_fobs_code          2014163