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_4519456
_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, 2(I)'
_chemical_formula_sum            'C12 H14 I2 N2'
_chemical_formula_weight         440.05
_chemical_name_common            'Paraquat Diiodide'
_chemical_name_systematic
;
1,1'-dimethyl-4,4'-bipyridin-1-ium bis(iodide)
;
_space_group_crystal_system      orthorhombic
_space_group_IT_number           64
_space_group_name_Hall           '-C 2ac 2'
_space_group_name_H-M_alt        'C m c e'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   13.5615(4)
_cell_length_b                   14.2021(4)
_cell_length_c                   14.7328(4)
_cell_measurement_reflns_used    9928
_cell_measurement_temperature    150
_cell_measurement_theta_max      60.665
_cell_measurement_theta_min      4.713
_cell_volume                     2837.56(14)
_computing_cell_refinement
;
SAINT (2019) V8.40A; Integration Software for Single Crystal Data.
Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_data_collection
;
APEX 3 (2019) Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_data_reduction
;
SAINT (2019) V8.40A; Integration Software for Single Crystal Data.
Bruker AXS Inc., Madison, WI 53719-1173.
;
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL  (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_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 0.976
_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  0.0593
_diffrn_reflns_av_unetI/netI     0.0366
_diffrn_reflns_Laue_measured_fraction_full 0.976
_diffrn_reflns_Laue_measured_fraction_max 0.980
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            17507
_diffrn_reflns_point_group_measured_fraction_full 0.976
_diffrn_reflns_point_group_measured_fraction_max 0.980
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         60.634
_diffrn_reflns_theta_min         4.712
_diffrn_source                   'Metal Jet'
_diffrn_source_current           2.86
_diffrn_source_power             0.199914
_diffrn_source_target            Ga
_diffrn_source_type              'Gallium Liquid Metal Jet Source'
_diffrn_source_voltage           69.9
_exptl_absorpt_coefficient_mu    23.802
_exptl_absorpt_correction_T_max  0.3107
_exptl_absorpt_correction_T_min  0.1356
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1444 before and 0.0893 after correction.
The Ratio of minimum to maximum transmission is 0.4364.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear light red'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    red
_exptl_crystal_density_diffrn    2.060
_exptl_crystal_description       plate
_exptl_crystal_F_000             1648
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.09
_refine_diff_density_max         1.157
_refine_diff_density_min         -1.157
_refine_diff_density_rms         0.126
_refine_ls_extinction_coef       0.00051(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2019/2 (Sheldrick 2019)'
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     86
_refine_ls_number_reflns         1663
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0293
_refine_ls_R_factor_gt           0.0280
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0386P)^2^+6.2841P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0736
_refine_ls_wR_factor_ref         0.0747
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                1555
_reflns_number_total             1663
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            S10_Pq-I2-Cmca.cif
_cod_data_source_block           jw22623
_cod_original_sg_symbol_Hall     '-C 2bc 2'
_cod_original_sg_symbol_H-M      'C m c a'
_cod_database_code               4519456
_cod_database_fobs_code 4519456