Crystallisation of organic salts by sublimation: salt formation from the gas phase
Lombard, Jean; Smith, Vincent J.; le Roex, Tanya; Haynes, Delia A.; CrystEngComm 22 (2020) 7826–7831; doi:10.1039/D0CE01470B

data_7241572
_publ_section_title
;
 Crystallisation of organic salts by sublimation: salt formation from the
 gas phase
;
_journal_issue                   45
_journal_name_full               CrystEngComm
_journal_page_first              7826
_journal_page_last               7831
_journal_paper_doi               10.1039/D0CE01470B
_journal_volume                  22
_journal_year                    2020
_chemical_formula_moiety         'C10 H10 N2, 2(C2 H O4)'
_chemical_formula_sum            'C14 H12 N2 O8'
_chemical_formula_weight         336.26
_chemical_name_common            '4,4-bipyridinium bis(hydrogen oxalate)'
_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
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2019-12-05 deposited with the CCDC.	2020-10-23 downloaded from the CCDC.
;
_cell_angle_alpha                116.121(1)
_cell_angle_beta                 96.721(1)
_cell_angle_gamma                98.409(1)
_cell_formula_units_Z            1
_cell_length_a                   3.7614(3)
_cell_length_b                   9.8932(7)
_cell_length_c                   10.4498(7)
_cell_measurement_reflns_used    2579
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      28.35
_cell_measurement_theta_min      2.35
_cell_volume                     338.11(4)
_computing_cell_refinement       'SAINT V8.37A (Bruker, 2016)'
_computing_data_collection       'APEX3 (Bruker, 2017)'
_computing_data_reduction        'SAINT V8.37A (Bruker, 2016)'
_computing_molecular_graphics
'X-seed (Barbour, 2001; Atwood & barbour, 2003)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      298(2)
_diffrn_detector                 'CCD area detector'
_diffrn_detector_type            'Bruker APEX II'
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker APEX DUO CCD area-detector'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'multilayer mirror optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0177
_diffrn_reflns_av_unetI/netI     0.0164
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            5441
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.992
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         28.412
_diffrn_reflns_theta_min         2.217
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_type              'Incoatec I\mS microsource'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.138
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.9614
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, 2016/2'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.651
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             174
_exptl_crystal_size_max          0.335
_exptl_crystal_size_mid          0.054
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.373
_refine_diff_density_min         -0.230
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.098
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     117
_refine_ls_number_reflns         1679
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.098
_refine_ls_R_factor_all          0.0457
_refine_ls_R_factor_gt           0.0409
_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^)+(0.0767P)^2^+0.0605P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1215
_refine_ls_wR_factor_ref         0.1264
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1462
_reflns_number_total             1679
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0ce01470b2.cif
_cod_data_source_block           2a_RT
_cod_database_code               7241572
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.955
_shelx_estimated_absorpt_t_max   0.993
_shelx_res_checksum              95358