Supramolecular assemblies involving salt bridges: DFT and X-ray evidence of bipolarity
Tripathi, Suparna; Islam, Samiul; Seth, Saikat Kumar; Bauzá, Antonio; Frontera, Antonio; Mukhopadhyay, Subrata; CrystEngComm 22 (2020) 8171–8181; doi:10.1039/D0CE01356K

data_7242017
_publ_section_title
;
 Supramolecular assemblies involving salt bridges: DFT and X-ray evidence
 of bipolarity
;
_journal_issue                   47
_journal_name_full               CrystEngComm
_journal_page_first              8171
_journal_page_last               8181
_journal_paper_doi               10.1039/D0CE01356K
_journal_volume                  22
_journal_year                    2020
_chemical_formula_moiety         'C14 H8 O5, 2(C6 H9 N2), H2O'
_chemical_formula_sum            'C26 H28 N4 O6'
_chemical_formula_weight         492.52
_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   mixed
_audit_creation_method           SHELXL-2018/1
_audit_update_record
;
2018-03-20 deposited with the CCDC.	2020-10-15 downloaded from the CCDC.
;
_cell_angle_alpha                90.019(3)
_cell_angle_beta                 92.555(2)
_cell_angle_gamma                107.022(4)
_cell_formula_units_Z            2
_cell_length_a                   6.855(4)
_cell_length_b                   7.642(3)
_cell_length_c                   24.281(4)
_cell_measurement_reflns_used    2240
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      1.5
_cell_volume                     1214.9(9)
_computing_cell_refinement       'APEX2(Bruker,2007)and SAINT (Bruker,2007)'
_computing_data_collection       'APEX2 (Bruker, 2007)'
_computing_data_reduction        'SAINT(Bruker,2007)and XPREP(Bruker,2007)'
_computing_molecular_graphics
;    
ORTEP-3 for Windows (Farrugia, 1997), DIAMOND (Brandenburg,
1999) and Mercury (Macrae <i>et al.</i>, 2006)
;
_computing_publication_material  'PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXL-2018/1 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/4 (Sheldrick, 2014)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker SMART APEX II CCD area-detector'
_diffrn_measurement_method       '\w and \f'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0238
_diffrn_reflns_av_unetI/netI     0.0257
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            11530
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        24.998
_diffrn_reflns_theta_max         24.998
_diffrn_reflns_theta_min         1.679
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.097
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.98
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.346
_exptl_crystal_description       block
_exptl_crystal_F_000             520
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.220
_refine_diff_density_min         -0.167
_refine_diff_density_rms         0.036
_refine_ls_extinction_coef       0.047(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/1 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     328
_refine_ls_number_reflns         4260
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.050
_refine_ls_R_factor_all          0.0388
_refine_ls_R_factor_gt           0.0339
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0461P)^2^+0.3636P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0910
_refine_ls_wR_factor_ref         0.0947
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3764
_reflns_number_total             4260
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0ce01356k2.cif
_cod_data_source_block           shelx_CCDC2
_cod_database_code               7242017
_shelx_shelxl_version_number     2018/1
_shelx_res_checksum              36309