Pyridinium-2-carboxylate–benzene-1,2-diol (1/1)
Ton, Cuong Quoc; Bolte, Michael; Acta Crystallographica Section E 65 (2009) o2834–; doi:10.1107/S1600536809043207

data_2223943
_publ_section_title
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 Pyridinium-2-carboxylate--benzene-1,2-diol (1/1)
;
_journal_coeditor_code           NG2670
_journal_issue                   11
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2834
_journal_paper_doi               10.1107/S1600536809043207
_journal_volume                  65
_journal_year                    2009
_chemical_formula_iupac          'C6 H5 N O2, C6 H6 O2'
_chemical_formula_moiety         'C6 H5 N O2, C6 H6 O2'
_chemical_formula_sum            'C12 H11 N O4'
_chemical_formula_weight         233.22
_chemical_name_systematic
;
Pyridinium-2-carboxylate--benzene-1,2-diol (1/1)
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.9710(14)
_cell_length_b                   6.9855(14)
_cell_length_c                   21.806(4)
_cell_measurement_reflns_used    6345
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      24.3
_cell_measurement_theta_min      3.5
_cell_volume                     1061.9(4)
_computing_cell_refinement       'X-AREA (Stoe & Cie, 2001)'
_computing_data_collection       'X-AREA (Stoe & Cie, 2001)'
_computing_data_reduction        'X-AREA (Stoe & Cie, 2001)'
_computing_molecular_graphics    'XP in SHELXTL-Plus (Sheldrick, 2008)'
_computing_publication_material
'PLATON (Spek, 2009) and SHELXL97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Stoe IPDSII two-circle'
_diffrn_measurement_method       \w
_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  0.0812
_diffrn_reflns_av_sigmaI/netI    0.0497
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            11928
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.79
_diffrn_reflns_theta_min         3.06
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.111
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.459
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.442
_refine_diff_density_min         -0.340
_refine_ls_extinction_coef       0.036(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL97 (Sheldrick, 2008)'
_refine_ls_goodness_of_fit_ref   1.227
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     155
_refine_ls_number_reflns         1196
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.227
_refine_ls_R_factor_all          0.1001
_refine_ls_R_factor_gt           0.0961
_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^)+(0.0513P)^2^+3.5668P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1946
_refine_ls_wR_factor_ref         0.1969
_reflns_number_gt                1105
_reflns_number_total             1196
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ng2670.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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 'Orthorhombic' changed to
'orthorhombic' 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_database_code               2223943
_cod_database_fobs_code          2223943