Regulation of Axial Chirality through Dynamic Covalent Bond Constrained Biaryls.
Zheng, Hao; Ni, Cailing; Chen, Hang; Zha, Daijun; Hai, Yu; Ye, Hebo; You, Lei; ACS omega 4 (2019) 10273–10278; doi:10.1021/acsomega.9b01273

data_4515156
_publ_section_title
;
 Regulation of Axial Chirality through Dynamic Covalent Bond Constrained
 Biaryls.
;
_journal_issue                   6
_journal_name_full               'ACS omega'
_journal_page_first              10273
_journal_page_last               10278
_journal_paper_doi               10.1021/acsomega.9b01273
_journal_volume                  4
_journal_year                    2019
_chemical_formula_moiety         'C20 H22 N2 O'
_chemical_formula_sum            'C20 H22 N2 O'
_chemical_formula_weight         306.39
_space_group_crystal_system      monoclinic
_space_group_IT_number           9
_space_group_name_Hall           'C -2yc'
_space_group_name_H-M_alt        'C 1 c 1'
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2019-05-23
_audit_creation_method
;
Olex2 1.2-beta
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
????
;
_cell_angle_alpha                90
_cell_angle_beta                 109.534(13)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.827(6)
_cell_length_b                   15.463(10)
_cell_length_c                   13.152(12)
_cell_measurement_reflns_used    2350
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.4739
_cell_measurement_theta_min      2.6346
_cell_volume                     1692(2)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_diffrn_ambient_temperature      173.15
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0627
_diffrn_reflns_av_unetI/netI     0.0742
_diffrn_reflns_Laue_measured_fraction_full 0.993
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            6299
_diffrn_reflns_point_group_measured_fraction_full 0.938
_diffrn_reflns_point_group_measured_fraction_max 0.920
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.489
_diffrn_reflns_theta_min         2.634
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.203
_exptl_crystal_description       Prism
_exptl_crystal_F_000             656
_refine_diff_density_max         0.114
_refine_diff_density_min         -0.128
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details
;
 Flack x determined using 763 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   2.0(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.032
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     209
_refine_ls_number_reflns         3576
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0838
_refine_ls_R_factor_gt           0.0473
_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^)+(0.0378P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0911
_refine_ls_wR_factor_ref         0.1031
_reflns_Friedel_coverage         0.855
_reflns_Friedel_fraction_full    0.883
_reflns_Friedel_fraction_max     0.850
_reflns_number_gt                2328
_reflns_number_total             3576
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ao9b01273_si_002.cif
_cod_data_source_block           6a
_cod_database_code               4515156
_shelx_shelxl_version_number     2014/7
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C6(H6)
2.b Secondary CH2 refined with riding coordinates:
 C16(H16A,H16B), C18(H18A,H18B), C19(H19A,H19B), C21(H21A,H21B), C23(H23A,H23B)
2.c Aromatic/amide H refined with riding coordinates:
 C7(H7), C10(H10), C12(H12), C13(H13), C14(H14), C15(H15), C17(H17), C20(H20)
2.d Idealised Me refined as rotating group:
 C22(H22A,H22B,H22C)
;
_shelx_res_checksum              69277
_shelx_hkl_checksum              8186
_olex2_submission_special_instructions 'No special instructions were received'