Thiophene-Based Double Helices: Syntheses, X-ray Structures, and Chiroptical Properties.
Zhang, Sheng; Liu, Xinming; Li, Chunli; Li, Lu; Song, Jinsheng; Shi, Jianwu; Morton, Martha; Rajca, Suchada; Rajca, Andrzej; Wang, Hua; Journal of the American Chemical Society 138 (2016) 10002–10010; doi:10.1021/jacs.6b05709

data_4130664
_publ_section_title
;
 Thiophene-Based Double Helices: Syntheses, X-ray Structures, and
 Chiroptical Properties.
;
_journal_issue                   31
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10002
_journal_page_last               10010
_journal_paper_doi               10.1021/jacs.6b05709
_journal_volume                  138
_journal_year                    2016
_chemical_formula_sum            'C42 H58 S6 Si6'
_chemical_formula_weight         923.78
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 100.7840(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.2794(7)
_cell_length_b                   19.0648(11)
_cell_length_c                   23.5740(13)
_cell_measurement_reflns_used    5665
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      22.77
_cell_measurement_theta_min      2.20
_cell_volume                     5421.3(5)
_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-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_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           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0415
_diffrn_reflns_av_sigmaI/netI    0.0500
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            27741
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.69
_exptl_absorpt_coefficient_mu    0.411
_exptl_absorpt_correction_T_max  0.9186
_exptl_absorpt_correction_T_min  0.8561
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.132
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1960
_exptl_crystal_size_max          0.39
_exptl_crystal_size_mid          0.27
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.590
_refine_diff_density_min         -0.308
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.019
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     487
_refine_ls_number_reflns         9527
_refine_ls_number_restraints     18
_refine_ls_restrained_S_all      1.019
_refine_ls_R_factor_all          0.0893
_refine_ls_R_factor_gt           0.0477
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0719P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1218
_refine_ls_wR_factor_ref         0.1368
_reflns_number_gt                5961
_reflns_number_total             9527
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja6b05709_si_004.cif
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_absorpt_correction_type' value 'Multi-scan' was
changed to 'multi-scan' 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.

data item '_symmetry_cell_setting' value 'Monoclinic' was changed to
'monoclinic' 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_sg_symbol_H-M      'P2(1)/c  '
_cod_database_code               4130664