Siloxa-bridged-cyclophanes featuring benzene, thiophene and pyridine units
Audrey Moores; Christian Defieber; Nicolas Mézailles; Nicole Maigrot; Louis Ricard; Pascal Le Floch; New J. Chem. 27 (2003) 994–999; doi:10.1039/b211045h

data_7050505
_publ_section_title
;
 Siloxa-bridged-cyclophanes featuring benzene, thiophene and pyridine
 units
;
_journal_issue                   6
_journal_name_full               'New J. Chem.'
_journal_page_first              994
_journal_page_last               999
_journal_paper_doi               10.1039/b211045h
_journal_volume                  27
_journal_year                    2003
_chemical_formula_sum            'C20 H32 O2 Si4'
_chemical_formula_weight         416.82
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                63.9270(10)
_cell_angle_beta                 71.7420(10)
_cell_angle_gamma                73.1410(10)
_cell_formula_units_Z            2
_cell_length_a                   8.7122(2)
_cell_length_b                   12.4992(2)
_cell_length_c                   12.9229(3)
_cell_measurement_reflns_used    251
_cell_measurement_temperature    150.0(10)
_cell_measurement_theta_max      20.0
_cell_measurement_theta_min      3.0
_cell_volume                     1181.11(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150.0(10)
_diffrn_measured_fraction_theta_full .981
_diffrn_measured_fraction_theta_max .981
_diffrn_measurement_device_type  KappaCCD
_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     0.71069
_diffrn_reflns_av_R_equivalents  0.0188
_diffrn_reflns_av_sigmaI/netI    0.0366
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            7700
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         2.50
_exptl_absorpt_coefficient_mu    0.263
_exptl_absorpt_correction_T_max  0.9492
_exptl_absorpt_correction_T_min  0.9492
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.172
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cube
_exptl_crystal_F_000             448
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         .411
_refine_diff_density_min         -.324
_refine_diff_density_rms         .047
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     243
_refine_ls_number_reflns         5298
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0361
_refine_ls_R_factor_gt           0.0317
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0528P)^2^+0.3568P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0949
_refine_ls_wR_factor_ref         0.0990
_reflns_number_gt                4730
_reflns_number_total             5298
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b211045h.txt
_cod_data_source_block           compound_2
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'P-1     '
_cod_database_code               7050505