Bridge-Chlorinated Bicyclo[1.1.1]pentane-1,3-dicarboxylic Acids.
Kaleta, Jiří; Rončević, Igor; Císařová, Ivana; Dračínský, Martin; Šolínová, Veronika; Kašička, Václav; Michl, Josef; The Journal of organic chemistry 84 (2019) 2448–2461; doi:10.1021/acs.joc.8b02780

data_4033700
_publ_section_title
;
 Bridge-Chlorinated Bicyclo[1.1.1]pentane-1,3-dicarboxylic Acids.
;
_journal_issue                   5
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              2448
_journal_page_last               2461
_journal_paper_doi               10.1021/acs.joc.8b02780
_journal_volume                  84
_journal_year                    2019
_chemical_compound_source        'Synthesized by Dr. Jiri Kaleta'
_chemical_formula_moiety         'C7 H6 Cl2 O4'
_chemical_formula_sum            'C7 H6 Cl2 O4'
_chemical_formula_weight         225.02
_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   mixed
_audit_creation_method           SHELXL-2018/1
_cell_angle_alpha                90
_cell_angle_beta                 106.715(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.3441(6)
_cell_length_b                   8.7828(6)
_cell_length_c                   12.8812(10)
_cell_measurement_reflns_used    9971
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.5109
_cell_measurement_theta_min      2.5486
_cell_volume                     904.11(11)
_computing_cell_refinement       'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_data_collection       'Bruker Instrument Service vV6.2.9'
_computing_data_reduction        'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_structure_refinement  'SHELXL-2018/1 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Bruker D8 VENTURE Kappa Duo PHOTON 100 CMOS'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'Quazar Mo multilayer optic'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0212
_diffrn_reflns_av_unetI/netI     0.0156
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            12778
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.526
_diffrn_reflns_theta_min         2.549
_diffrn_source                   'I\mS  micro-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.695
_exptl_absorpt_correction_T_max  0.90
_exptl_absorpt_correction_T_min  0.84
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 - Bruker AXS area detector scaling and absorption correction
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.653
_exptl_crystal_description       prism
_exptl_crystal_F_000             456
_exptl_crystal_size_max          0.270
_exptl_crystal_size_mid          0.198
_exptl_crystal_size_min          0.158
_refine_diff_density_max         0.352
_refine_diff_density_min         -0.255
_refine_diff_density_rms         0.044
_refine_ls_extinction_coef       0.0108(16)
_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   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     120
_refine_ls_number_reflns         2084
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0279
_refine_ls_R_factor_gt           0.0236
_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^)+(0.0329P)^2^+0.3895P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0623
_refine_ls_wR_factor_ref         0.0644
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1876
_reflns_number_total             2084
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo8b02780_si_003.cif
_cod_data_source_block           JK830
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4033700
_shelx_shelxl_version_number     2018/1
_shelx_estimated_absorpt_t_min   0.835
_shelx_estimated_absorpt_t_max   0.898
_shelx_res_checksum              17477
_shelx_hkl_checksum              99240