Precise Molecular Design Toward Organic-Inorganic Zinc Chloride ABX<sub>3</sub> Ferroelectrics.
Chen, Lizhuang; Liao, Wei-Qiang; Ai, Yong; Li, Junyi; Deng, Siyu; Hou, Yunlong; Tang, Yuan-Yuan; Journal of the American Chemical Society 142 (2020) 6236–6243; doi:10.1021/jacs.0c00315

data_4134462
_publ_section_title
;
 Precise Molecular Design Toward Organic-Inorganic Zinc Chloride
 ABX<sub>3</sub> Ferroelectrics.
;
_journal_issue                   13
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6236
_journal_page_last               6243
_journal_paper_doi               10.1021/jacs.0c00315
_journal_volume                  142
_journal_year                    2020
_chemical_formula_moiety         'Cl3 Zn, C4 H11 Br N'
_chemical_formula_sum            'C4 H11 Br Cl3 N Zn'
_chemical_formula_weight         324.77
_space_group_crystal_system      orthorhombic
_space_group_IT_number           26
_space_group_name_Hall           'P 2c -2'
_space_group_name_H-M_alt        'P m c 21'
_atom_sites_solution_hydrogens   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.1748(4)
_cell_length_b                   9.1116(5)
_cell_length_c                   17.2922(10)
_cell_measurement_reflns_used    4312
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.6510
_cell_measurement_theta_min      3.2350
_cell_volume                     1130.46(11)
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.979
_diffrn_measurement_device_type  'XtaLAB Synergy R, DW system, HyPix'
_diffrn_measurement_method       'four-circle diffractometer'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0618
_diffrn_reflns_av_unetI/netI     0.0623
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.979
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            5700
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.980
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.248
_diffrn_reflns_theta_min         2.527
_diffrn_source                   'Rotating-anode X-ray tube'
_exptl_absorpt_coefficient_mu    6.357
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.33460
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrysAlisPro 1.171.39.46 (Rigaku OD, 2018)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.908
_exptl_crystal_description       Prism
_exptl_crystal_F_000             632
_exptl_crystal_size_max          0.210
_exptl_crystal_size_mid          0.210
_exptl_crystal_size_min          0.200
_refine_diff_density_max         1.545
_refine_diff_density_min         -2.085
_refine_diff_density_rms         0.308
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.098(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     116
_refine_ls_number_reflns         2426
_refine_ls_number_restraints     19
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0712
_refine_ls_R_factor_gt           0.0611
_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^)+(0.1239P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1633
_refine_ls_wR_factor_ref         0.1693
_reflns_Friedel_coverage         0.935
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.981
_reflns_number_gt                2072
_reflns_number_total             2426
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja0c00315_si_007.cif
_cod_data_source_block           '[(CH3)3NCH2Br]ZnCl3-293K'
_cod_depositor_comments
'Adding full bibliography for 4134460--4134466.cif.'
_cod_database_code               4134462
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.349
_shelx_estimated_absorpt_t_max   0.363
_shelx_res_checksum              60156
_shelx_hkl_checksum              692