Chiral Organic Cages with a Triple-Stranded Helical Structure Derived from Helicene.
Malik, Abaid Ullah; Gan, Fuwei; Shen, Chengshuo; Yu, Na; Wang, Ruibin; Crassous, Jeanne; Shu, Mouhai; Qiu, Huibin; Journal of the American Chemical Society 140 (2018) 2769–2772; doi:10.1021/jacs.7b13512

data_4131959
_publ_section_title
;
 Chiral Organic Cages with a Triple-Stranded Helical Structure Derived
 from Helicene.
;
_journal_issue                   8
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2769
_journal_page_last               2772
_journal_paper_doi               10.1021/jacs.7b13512
_journal_volume                  140
_journal_year                    2018
_chemical_absolute_configuration rm
_chemical_formula_moiety         'C30 H16'
_chemical_formula_sum            'C30 H16'
_chemical_formula_weight         376.43
_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   mixed
_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                   5.146
_cell_length_b                   18.162
_cell_length_c                   20.254
_cell_measurement_reflns_used    9970
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      3.27
_cell_measurement_theta_min      65.03
_cell_volume                     1892.972
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-2014 (Sheldrick, 2014)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0422
_diffrn_reflns_av_unetI/netI     0.0222
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            21289
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        65.127
_diffrn_reflns_theta_max         65.127
_diffrn_reflns_theta_min         3.268
_exptl_absorpt_coefficient_mu    0.572
_exptl_absorpt_correction_T_max  0.8826
_exptl_absorpt_correction_T_min  0.8577
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_description       block
_exptl_crystal_F_000             784
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.091
_refine_diff_density_min         -0.142
_refine_diff_density_rms         0.034
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.0(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     278
_refine_ls_number_reflns         3224
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0314
_refine_ls_R_factor_gt           0.0282
_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^)+(0.0326P)^2^+0.2004P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0650
_refine_ls_wR_factor_ref         0.0668
_reflns_Friedel_coverage         0.692
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                3008
_reflns_number_total             3224
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b13512_si_002.cif
_cod_data_source_block           t_a
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_chemical_absolute_configuration' value 'RM' was changed
to 'rm' in accordance with the
/home/saulius/struct/COD-crude-data/automatic-downloads/DataCite-retrospective/ACS/depositions/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_cell_volume        1893.2
_cod_database_code               4131959
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              88724
_shelx_hkl_checksum              27333