Co-crystals and molecular salts of carboxylic acid/pyridine complexes: can calculated pKa's predict proton transfer? A case study of nine complexes
Lemmerer, Andreas; Govindraju, Stefan; Johnston, Marcelle; Motloung, Xolani; Savig, Kelsey L.; CrystEngComm 17 (2015) 3591–; doi:10.1039/C5CE00102A

data_7219647
_publ_section_title
;
 Co-crystals and molecular salts of carboxylic acid/pyridine complexes:
 can calculated pKa's predict proton transfer? A case study of nine
 complexes
;
_journal_issue                   19
_journal_name_full               CrystEngComm
_journal_page_first              3591
_journal_paper_doi               10.1039/C5CE00102A
_journal_volume                  17
_journal_year                    2015
_chemical_formula_moiety         'C7 H3 Cl N O4, C5 H6 Br N2'
_chemical_formula_sum            'C12 H9 Br Cl N3 O4'
_chemical_formula_weight         374.58
_chemical_name_systematic
;
 (2-chloro-4-nitrobenzoate)(2-amino-5-bromopyridinium)
;
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.3
_audit_creation_date             2012-11-02T05:50:25-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_audit_update_record
;
2014-11-18 deposited with the CCDC.
2015-02-24 downloaded from the CCDC.
;
_cell_angle_alpha                94.312(2)
_cell_angle_beta                 91.431(2)
_cell_angle_gamma                96.374(2)
_cell_formula_units_Z            2
_cell_length_a                   3.9305(2)
_cell_length_b                   12.4261(6)
_cell_length_c                   13.8457(7)
_cell_measurement_reflns_used    4824
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.19
_cell_measurement_theta_min      2.3
_cell_volume                     669.77(6)
_computing_cell_refinement       'SAINT-Plus (Bruker, 2007)'
_computing_data_collection       'APEX3 (Bruker, 2007)'
_computing_data_reduction        'SAINT-Plus (Bruker 2007)'
_computing_molecular_graphics
;
Ortep-3 for Windows (Farrugia, 1997) and DIAMOND (Brandenburg, 1999)
;
_computing_publication_material
;
WinGX publication routines (Farrugia, 1999) and PLATON (Spek, 2009)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker D8 Venture Photon CMOS'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0613
_diffrn_reflns_av_unetI/netI     0.0467
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            9646
_diffrn_reflns_theta_full        28
_diffrn_reflns_theta_max         28
_diffrn_reflns_theta_min         1.48
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.288
_exptl_absorpt_correction_T_max  0.7652
_exptl_absorpt_correction_T_min  0.2386
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details   'Bruker XPREP (Bruker, 2004)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.857
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             372
_exptl_crystal_size_max          0.61
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.598
_refine_diff_density_min         -0.522
_refine_diff_density_rms         0.082
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.907
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     202
_refine_ls_number_reflns         3229
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.907
_refine_ls_R_factor_all          0.0375
_refine_ls_R_factor_gt           0.029
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0366P)^2^+0.1929P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0661
_refine_ls_wR_factor_ref         0.0689
_reflns_number_gt                2709
_reflns_number_total             3229
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5ce00102a4.cif
_cod_data_source_block           7
_cod_depositor_comments
'Adding full bibliography for 7219641--7219649.cif.'
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7219647