Construction of helical structures with planar chiral [2.2]paracyclophane: fusing helical and planar chiralities.
Tsuchiya, Motoki; Maeda, Hazuki; Inoue, Ryo; Morisaki, Yasuhiro; Chemical communications (Cambridge, England) 57 (2021) 9256–9259; doi:10.1039/d1cc03320d

data_7128869
_publ_section_title
;
 Construction of helical structures with planar chiral
 [2.2]paracyclophane: fusing helical and planar chiralities.
;
_journal_issue                   73
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              9256
_journal_page_last               9259
_journal_paper_doi               10.1039/d1cc03320d
_journal_volume                  57
_journal_year                    2021
_chemical_absolute_configuration rm
_chemical_formula_sum            'C28 H33 Br O5'
_chemical_formula_weight         529.45
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2018/3
_audit_update_record
;
2021-05-20 deposited with the CCDC.	2021-08-16 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.946(9)
_cell_length_b                   8.073(10)
_cell_length_c                   39.47(5)
_cell_measurement_reflns_used    6032
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.5348
_cell_measurement_theta_min      2.9948
_cell_volume                     2532(5)
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  CCD
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0646
_diffrn_reflns_av_unetI/netI     0.0417
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.988
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       51
_diffrn_reflns_limit_l_min       -51
_diffrn_reflns_number            26196
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.988
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.485
_diffrn_reflns_theta_min         2.995
_exptl_absorpt_coefficient_mu    1.659
_exptl_absorpt_correction_T_max  1
_exptl_absorpt_correction_T_min  0.8485
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.389
_exptl_crystal_description       Platelet
_exptl_crystal_F_000             1104
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.413
_refine_diff_density_min         -0.914
_refine_diff_density_rms         0.101
_refine_ls_abs_structure_details
;
 Flack x determined using 2033 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.001(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.100
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     324
_refine_ls_number_reflns         5754
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.100
_refine_ls_R_factor_all          0.0462
_refine_ls_R_factor_gt           0.0427
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0567P)^2^+0.6458P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1055
_refine_ls_wR_factor_ref         0.1088
_reflns_Friedel_coverage         0.734
_reflns_Friedel_fraction_full    0.997
_reflns_Friedel_fraction_max     0.988
_reflns_number_gt                5336
_reflns_number_total             5754
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1cc03320d2.cif
_cod_data_source_block           chiral-pseudo-meta
_cod_depositor_comments
'Adding full bibliography for 7128869--7128874.cif.'
_cod_database_code               7128869
_shelx_shelxl_version_number     2018/3
_shelx_res_checksum              40885