Ladder distyrylbenzenes with silicon and chalcogen bridges: synthesis, structures, and properties.
Mouri, Kazuhiro; Wakamiya, Atsushi; Yamada, Hiroshi; Kajiwara, Takashi; Yamaguchi, Shigehiro; Organic letters 9 (2007) 93–96; doi:10.1021/ol062615s

data_1505243
_publ_section_title
;
 Ladder distyrylbenzenes with silicon and chalcogen bridges: synthesis,
 structures, and properties.
;
_journal_issue                   1
_journal_name_full               'Organic letters'
_journal_page_first              93
_journal_page_last               96
_journal_paper_doi               10.1021/ol062615s
_journal_volume                  9
_journal_year                    2007
_chemical_formula_sum            'C26 H22 O4 S2 Si2'
_chemical_formula_weight         518.74
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yab'
_symmetry_space_group_name_H-M   'P 1 21/a 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.0000(11)
_cell_angle_beta                 106.6984(14)
_cell_angle_gamma                90.0000(11)
_cell_formula_units_Z            2
_cell_length_a                   13.042(4)
_cell_length_b                   6.878(2)
_cell_length_c                   14.555(5)
_cell_measurement_temperature    123(2)
_cell_volume                     1250.6(7)
_computing_molecular_graphics    'ORTEP 3 for windows'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type
;
Saturn70 CCD (4x4 bin mode) with MicroMax-007
;
_diffrn_measurement_method       dtprofit.ref
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0549
_diffrn_reflns_av_sigmaI/netI    0.0494
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            8017
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.46
_exptl_absorpt_coefficient_mu    0.340
_exptl_absorpt_correction_T_max  0.9899
_exptl_absorpt_correction_T_min  0.9603
_exptl_absorpt_correction_type   empirical
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.378
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             540
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.294
_refine_diff_density_min         -0.368
_refine_diff_density_rms         0.067
_refine_ls_extinction_coef       none
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.128
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     156
_refine_ls_number_reflns         2197
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.128
_refine_ls_R_factor_all          0.0700
_refine_ls_R_factor_gt           0.0523
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0542P)^2^+0.4217P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1107
_refine_ls_wR_factor_ref         0.1198
_reflns_number_gt                1810
_reflns_number_total             2197
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol062615ssi20061024_093114.cif
_cod_data_source_block           6a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1250.5(7)
_cod_original_sg_symbol_H-M      P21/a
_cod_database_code               1505243