Molecular tectonics - Use of urethanes and ureas derived from tetraphenylmethane and tetraphenylsilane to build porous chiral hydrogenbonded networks
Dominic Laliberté; Thierry Maris; James D. Wuest; Can. J. Chem. 82 (2004) 386–398; doi:10.1139/v03-208

data_1501611
_publ_section_title
;
 Molecular tectonics - Use of urethanes and ureas derived from
 tetraphenylmethane and tetraphenylsilane to build porous chiral
 hydrogenbonded networks
;
_journal_name_full               'Can. J. Chem.'
_journal_page_first              386
_journal_page_last               398
_journal_paper_doi               10.1139/v03-208
_journal_volume                  82
_journal_year                    2004
_chemical_compound_source        'Synthesized by the authors. See text'
_chemical_formula_sum            'C44 H56 N4 O12 Si'
_chemical_formula_weight         861.02
_space_group_IT_number           86
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-P 4bc'
_symmetry_space_group_name_H-M   'P 42/n :2'
_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            2
_cell_length_a                   17.7781(2)
_cell_length_b                   17.7781(2)
_cell_length_c                   7.19040(10)
_cell_measurement_reflns_used    9912
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      72.26
_cell_measurement_theta_min      2.49
_cell_volume                     2272.60(5)
_computing_cell_refinement       'SMART (Bruker, 1999)'
_computing_data_collection       'SAINT (Bruker, 1999)'
_computing_data_reduction        'SAINT (Bruker, 1999)'
_computing_molecular_graphics    'XP (Bruker, 1999)'
_computing_publication_material  'UdMX (local program)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 5.5
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker AXS Smart 2K/Platform'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Sealed Tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.025
_diffrn_reflns_av_sigmaI/netI    0.0194
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            15976
_diffrn_reflns_theta_full        72.89
_diffrn_reflns_theta_max         72.89
_diffrn_reflns_theta_min         3.52
_diffrn_standards_decay_%        0.00
_diffrn_standards_number         5
_exptl_absorpt_coefficient_mu    0.995
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7800
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs (Sheldrick,1996)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.258
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             916
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.364
_refine_diff_density_min         -0.162
_refine_diff_density_rms         0.067
_refine_ls_extinction_coef       0.0000(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.023
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     139
_refine_ls_number_reflns         2240
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.0879
_refine_ls_R_factor_gt           0.0724
_refine_ls_shift/su_max          3.990
_refine_ls_shift/su_mean         0.029
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1542P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2024
_refine_ls_wR_factor_ref         0.2160
_reflns_number_gt                1627
_reflns_number_total             2240
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            deposit.cif
_cod_data_source_block           jiw371
_cod_original_sg_symbol_H-M      P42/n
_cod_database_code               1501611