Salts and Co-Crystals of Gentisic Acid with Pyridine Derivatives: The Effect of Proton Transfer on the Crystal Packing (and Vice Versa)
Stilinović, Vladimir; Kaitner, Branko; Crystal Growth & Design 12 (2012) 5763–; doi:10.1021/cg301267h

data_4507038
_publ_section_title
;
 Salts and Co-Crystals of Gentisic Acid with Pyridine Derivatives: The
 Effect of Proton Transfer on the Crystal Packing (and Vice Versa)
;
_journal_issue                   11
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              5763
_journal_paper_doi               10.1021/cg301267h
_journal_volume                  12
_journal_year                    2012
_chemical_formula_moiety         'C7 H5 O4, C6 H8 N'
_chemical_formula_sum            'C13 H13 N O4'
_chemical_formula_weight         247.24
_chemical_name_systematic
;
2-methylpyridinium 2,5-dihydroxybenzoate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2012-02-22T13:43:36-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 113.673(16)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   7.4525(9)
_cell_length_b                   44.783(4)
_cell_length_c                   8.0945(12)
_cell_measurement_reflns_used    98
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      52.0
_cell_measurement_theta_min      4.6
_cell_volume                     2474.2(6)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type
;
Oxford Diffraction Xcalibur CCD
diffractometer
;
_diffrn_measurement_method       '\w scan'
_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  0.0792
_diffrn_reflns_av_unetI/netI     0.1331
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       52
_diffrn_reflns_limit_k_min       -50
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            12697
_diffrn_reflns_theta_full        25
_diffrn_reflns_theta_max         25
_diffrn_reflns_theta_min         3.87
_diffrn_standards_number         27
_exptl_absorpt_coefficient_mu    0.099
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.328
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1040
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.19
_refine_diff_density_min         -0.187
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.891
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     351
_refine_ls_number_reflns         4334
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.891
_refine_ls_R_factor_all          0.1549
_refine_ls_R_factor_gt           0.0688
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0556P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1259
_refine_ls_wR_factor_ref         0.1414
_reflns_number_gt                1862
_reflns_number_total             4334
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg301267h_si_002.cif
_cod_data_source_block           2H_gent
_cod_original_cell_volume        2474.2(5)
_cod_original_sg_symbol_Hall     '-P 2yn '
_cod_original_sg_symbol_H-M      'P 21/n '
_cod_database_code               4507038