Adding a Pinch of Salt: Using Ionic Mixed-Crystal Seeds to Search for New Solid Forms
Abdel Rahman Al Ahmad; Thierry Maris; Christian Pellerin; James D. Wuest; Crystal Growth & Design 23 (2023) 7472–7481; doi:10.1021/acs.cgd.3c00884

data_4519471
_publ_section_title
;
 Adding a Pinch of Salt: Using Ionic Mixed-Crystal Seeds to Search for New
 Solid Forms
;
_journal_name_full               'Crystal Growth & Design'
_journal_page_first              7472
_journal_page_last               7481
_journal_paper_doi               10.1021/acs.cgd.3c00884
_journal_volume                  23
_journal_year                    2023
_chemical_formula_moiety         'C12 H14 N2, 0.996(Br), 1.004(Cl)'
_chemical_formula_sum            'C12 H14 Br Cl N2'
_chemical_formula_weight         301.39
_chemical_name_common
;
Paraquat Bromide Chloride 1:1
;
_chemical_name_systematic
;
1,1'-dimethyl-4,4'-bipyridin-1-ium bromide chloride
;
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_cell_angle_alpha                90
_cell_angle_beta                 96.133(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   5.8291(2)
_cell_length_b                   8.1043(3)
_cell_length_c                   13.1926(5)
_cell_measurement_reflns_used    3758
_cell_measurement_temperature    150
_cell_measurement_theta_max      54.761
_cell_measurement_theta_min      4.748
_cell_volume                     619.66(4)
_computing_cell_refinement
;
SAINT (2020) V8.40B; Integration Software for Single Crystal Data.
Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_data_collection
;
APEX 4 (2022) Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_data_reduction
;
SAINT (2020) V8.40B; Integration Software for Single Crystal Data.
Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      150
_diffrn_detector                 'CMOS Area detector'
_diffrn_detector_area_resol_mean 10.42
_diffrn_detector_type            'Bruker CMOS Photon III '
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.980
_diffrn_measurement_device       'k-geometry diffractometer'
_diffrn_measurement_device_type  'Bruker Venture Metaljet'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_collimation    'Focusing mirrors'
_diffrn_radiation_monochromator  'Helios MX Mirror Optics'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Ga K\a'
_diffrn_radiation_wavelength     1.34139
_diffrn_reflns_av_R_equivalents  0.0300
_diffrn_reflns_av_unetI/netI     0.0240
_diffrn_reflns_Laue_measured_fraction_full 0.986
_diffrn_reflns_Laue_measured_fraction_max 0.980
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            5717
_diffrn_reflns_point_group_measured_fraction_full 0.986
_diffrn_reflns_point_group_measured_fraction_max 0.980
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         54.895
_diffrn_reflns_theta_min         5.583
_diffrn_source                   'Metal Jet'
_diffrn_source_current           2.85
_diffrn_source_power             0.1986735
_diffrn_source_target            Ga
_diffrn_source_type              'Gallium Liquid Metal Jet Source'
_diffrn_source_voltage           69.71
_exptl_absorpt_coefficient_mu    4.163
_exptl_absorpt_correction_T_max  0.1452
_exptl_absorpt_correction_T_min  0.0611
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1262 before and 0.0505 after correction.
The Ratio of minimum to maximum transmission is 0.4208.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.615
_exptl_crystal_description       needle
_exptl_crystal_F_000             304
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.212
_refine_diff_density_min         -0.197
_refine_diff_density_rms         0.046
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.156
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     78
_refine_ls_number_reflns         1148
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.156
_refine_ls_R_factor_all          0.0289
_refine_ls_R_factor_gt           0.0231
_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^)+(0.0200P)^2^+0.2405P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0566
_refine_ls_wR_factor_ref         0.0586
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                991
_reflns_number_total             1148
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            S28_Pq-Br_1_00_Cl_1_00_P21_c.cif
_cod_data_source_block           jw25612
_cod_database_code               4519471
_cod_database_fobs_code 4519471