Syntheses and Crystal Structures of Benzohexathia[7]helicene and Naphthalene Cored Double Helicene
Wang, Zhihua; Shi, Jianwu; Wang, Jiange; Li, Chunli; Tian, Xinyong; Cheng, Yanxiang; Wang, Hua; Organic Letters 12 (2010) 456–459; doi:10.1021/ol902613g

data_1516316
_publ_section_title
;
 Syntheses and Crystal Structures of Benzohexathia[7]helicene and
 Naphthalene Cored Double Helicene
;
_journal_coden_ASTM              ORLEF7
_journal_issue                   3
_journal_name_full               'Organic Letters'
_journal_page_first              456
_journal_page_last               459
_journal_paper_doi               10.1021/ol902613g
_journal_volume                  12
_journal_year                    2010
_chemical_formula_sum            'C46 H40 S12 Si4'
_chemical_formula_weight         1089.86
_chemical_name_common            compd-2
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   16.816(3)
_cell_length_b                   16.811(3)
_cell_length_c                   38.298(7)
_cell_measurement_reflns_used    9925
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      19.44
_cell_measurement_theta_min      2.34
_cell_volume                     10827(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0592
_diffrn_reflns_av_sigmaI/netI    0.0568
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       47
_diffrn_reflns_limit_l_min       -47
_diffrn_reflns_number            86699
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.34
_exptl_absorpt_coefficient_mu    0.604
_exptl_absorpt_correction_T_max  0.9658
_exptl_absorpt_correction_T_min  0.8856
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            yelllow
_exptl_crystal_density_diffrn    1.337
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             4512
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.210
_refine_diff_density_min         -0.200
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.30(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.886
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1118
_refine_ls_number_reflns         21119
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.886
_refine_ls_R_factor_all          0.0774
_refine_ls_R_factor_gt           0.0459
_refine_ls_shift/su_max          0.022
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1172
_refine_ls_wR_factor_ref         0.1439
_reflns_number_gt                15349
_reflns_number_total             21119
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             1503372
_cod_data_source_file            ol902613g_si_004.cif
_cod_data_source_block           w495
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/automatic-downloads/retrospective/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_cell_volume        10826(3)
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1516316