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_4507042
_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, C8 H12 N'
_chemical_formula_sum            'C15 H17 N O4'
_chemical_formula_weight         275.3
_chemical_name_systematic
;
2,4,6-trimethylpyridinium 2,5-dihydroxybenzoate
;
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2012-07-10T12:33:51-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 93.131(12)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.0799(7)
_cell_length_b                   13.7595(12)
_cell_length_c                   11.664(3)
_cell_measurement_reflns_used    165
_cell_measurement_temperature    295(2)
_cell_measurement_theta_max      52.0
_cell_measurement_theta_min      4.6
_cell_volume                     1455.1(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_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  0.0163
_diffrn_reflns_av_unetI/netI     0.0334
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            3184
_diffrn_reflns_theta_full        27
_diffrn_reflns_theta_max         27
_diffrn_reflns_theta_min         4.51
_diffrn_standards_number         27
_exptl_absorpt_coefficient_mu    0.091
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.257
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.125
_refine_diff_density_min         -0.151
_refine_diff_density_rms         0.035
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.901
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     196
_refine_ls_number_reflns         2115
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      0.901
_refine_ls_R_factor_all          0.0515
_refine_ls_R_factor_gt           0.0357
_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^)+(0.0552P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0823
_refine_ls_wR_factor_ref         0.0859
_reflns_number_gt                1525
_reflns_number_total             2115
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg301267h_si_002.cif
_cod_data_source_block           6H_gent
_cod_original_sg_symbol_H-M      'C c'
_cod_database_code               4507042