Preorganized helical chirality controlled homochiral self-assembly and circularly polarized luminescence of a quadruple-stranded Eu<sub>2</sub>L<sub>4</sub> helicate.
Han, Guoying; Zhou, Yanyan; Yao, Yuan; Cheng, Zhenyu; Gao, Ting; Li, Hongfeng; Yan, Pengfei; Dalton transactions (Cambridge, England : 2003) 49 (2020) 3312–3320; doi:10.1039/d0dt00062k

data_7703499
_publ_section_title
;
 Preorganized helical chirality controlled homochiral self-assembly and
 circularly polarized luminescence of a quadruple-stranded
 Eu<sub>2</sub>L<sub>4</sub> helicate.
;
_journal_issue                   10
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3312
_journal_page_last               3320
_journal_paper_doi               10.1039/d0dt00062k
_journal_volume                  49
_journal_year                    2020
_chemical_absolute_configuration s
_chemical_formula_moiety         'C31 H25 F6 N O6'
_chemical_formula_sum            'C31 H25 F6 N O6'
_chemical_formula_weight         621.52
_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_date             2019-12-18
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-12-18 deposited with the CCDC.	2020-02-10 downloaded from the CCDC.
;
_cell_angle_alpha                90.000(5)
_cell_angle_beta                 90.000(5)
_cell_angle_gamma                90.000(5)
_cell_formula_units_Z            4
_cell_length_a                   9.105(5)
_cell_length_b                   11.571(5)
_cell_length_c                   27.397(5)
_cell_measurement_reflns_used    9827
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      26.180
_cell_measurement_theta_min      2.686
_cell_volume                     2886(2)
_computing_cell_refinement       'SAINT V8.40A (?, 2016)'
_computing_data_reduction        'SAINT V8.40A (?, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0526
_diffrn_reflns_av_unetI/netI     0.0237
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            67450
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.240
_diffrn_reflns_theta_max         26.760
_diffrn_reflns_theta_min         2.686
_exptl_absorpt_coefficient_mu    0.124
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.430
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1280
_refine_diff_density_max         0.531
_refine_diff_density_min         -0.354
_refine_diff_density_rms         0.050
_refine_ls_abs_structure_details
;
 Flack x determined using 1524 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     398
_refine_ls_number_reflns         6161
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0987
_refine_ls_R_factor_gt           0.0608
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0916P)^2^+1.3554P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1594
_refine_ls_wR_factor_ref         0.1962
_reflns_Friedel_coverage         0.766
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                4152
_reflns_number_total             6161
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0dt00062k2.cif
_cod_data_source_block           2
_cod_depositor_comments
'Adding full bibliography for 7703499--7703500.cif.'
_cod_database_code               7703499
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H,H) groups, H38 of C38, H40 of C40, H37 of C37, H33 of C33, H41 of
  C41, H32 of C32, H42 of C42, H31 of C31, H21 of C21, H8 of C8, H9 of C9, H1
  of C1, H20 of C20, H28 of C28, H10 of C10, H24 of C24, H26 of C26
 At 1.5 times of:
  All O(H) groups, H4 of C42
2.a Everything fixed:
 H4
2.b Ternary CH refined with riding coordinates:
 C24(H24), C33(H33)
2.c Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B), C4(H4A,H4B), C5(H5A,H5B)
2.d Aromatic/amide H refined with riding coordinates:
 C1(H1), C8(H8), C9(H9), C10(H10), C20(H20), C21(H21), C26(H26), C28(H28),
 C31(H31), C32(H32), C37(H37), C38(H38), C40(H40), C41(H41), C42(H42)
2.e Idealised tetrahedral OH refined as rotating group:
 O2(H2)
;
_shelx_res_checksum              146
_olex2_submission_special_instructions 'No special instructions were received'