Perylene Diimide-Embedded Double [8]Helicenes.
Liu, Bo; Böckmann, Marcus; Jiang, Wei; Doltsinis, Nikos L.; Wang, Zhaohui; Journal of the American Chemical Society  (2020) –; doi:10.1021/jacs.0c00954

data_4134592
_publ_section_title
;
 Perylene Diimide-Embedded Double [8]Helicenes.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.0c00954
_journal_year                    2020
_chemical_formula_sum            'C72 H66 N2 O4'
_chemical_formula_weight         1023.26
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2018/3
_cell_angle_alpha                106.7040(10)
_cell_angle_beta                 98.6010(10)
_cell_angle_gamma                105.0170(10)
_cell_formula_units_Z            4
_cell_length_a                   15.1377(2)
_cell_length_b                   19.4899(3)
_cell_length_c                   22.4137(2)
_cell_measurement_reflns_used    74976
_cell_measurement_temperature    169.99(10)
_cell_measurement_theta_max      75.0220
_cell_measurement_theta_min      2.5750
_cell_volume                     5935.33(15)
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      169.99(10)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'XtaLAB Synergy R, HyPix'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0838
_diffrn_reflns_av_unetI/netI     0.0276
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            206866
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        66.497
_diffrn_reflns_theta_max         66.497
_diffrn_reflns_theta_min         2.497
_exptl_absorpt_coefficient_mu    0.544
_exptl_absorpt_correction_T_max  0.9476
_exptl_absorpt_correction_T_min  0.8408
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            'dark red'
_exptl_crystal_density_diffrn    1.145
_exptl_crystal_description       plate
_exptl_crystal_F_000             2176
_exptl_crystal_size_max          0.330
_exptl_crystal_size_mid          0.220
_exptl_crystal_size_min          0.100
_refine_diff_density_max         1.538
_refine_diff_density_min         -0.600
_refine_diff_density_rms         0.095
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.717
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1409
_refine_ls_number_reflns         20858
_refine_ls_number_restraints     115
_refine_ls_restrained_S_all      1.749
_refine_ls_R_factor_all          0.1216
_refine_ls_R_factor_gt           0.1110
_refine_ls_shift/su_max          0.016
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.2000P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3620
_refine_ls_wR_factor_ref         0.3817
_reflns_Friedel_coverage         0.000
_reflns_number_gt                16761
_reflns_number_total             20858
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja0c00954_si_002.cif
_cod_data_source_block           tx395a_sq
_cod_original_cell_volume        5935.33(14)
_cod_database_code               4134592
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.841
_shelx_estimated_absorpt_t_max   0.948
_shelx_res_checksum              90476
_shelx_hkl_checksum              79329
_shelx_fab_checksum              89157