Fine-tuning of biaryl dihedral angles: structural characterization of five homologous three-atom bridged biphenyls by X-ray crystallography
Edwards, David J.; Pritchard, Robin G.; Wallace, Timothy W.; Acta Crystallographica Section B 61 (2005) 335–345; doi:10.1107/S0108768105006713

data_2100222
_publ_section_title
;
 Fine-tuning of biaryl dihedral angles: structural characterization of
 five homologous three-atom bridged biphenyls by X-ray crystallography
;
_journal_issue                   3
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              335
_journal_page_last               345
_journal_paper_doi               10.1107/S0108768105006713
_journal_volume                  61
_journal_year                    2005
_chemical_formula_moiety         'C20 H24 O7'
_chemical_formula_sum            'C20 H24 O7'
_chemical_formula_weight         376.39
_chemical_name_systematic
;
5,7-dihydro-1,2,3,9,10,11-hexamethoxydibenzo[c,e]oxepine
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.2
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 109.607(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.3519(4)
_cell_length_b                   10.4044(3)
_cell_length_c                   11.8506(4)
_cell_measurement_reflns_used    5472
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      0.998
_cell_volume                     1783.11(9)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0628
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            9423
_diffrn_reflns_reduction_process
;
 Scaled and merged with SORTAV
 R.H. Blessing, (1987) Cryst. Rev. 1, 3-58
 R.H. Blessing, (1989) J. Appl. Cryst. 22, 396-397
;
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         2.82
_exptl_absorpt_coefficient_mu    0.106
_exptl_absorpt_correction_T_max  1.014
_exptl_absorpt_correction_T_min  0.992
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 R.H. Blessing, Acta Cryst. (1995), A51, 33-38
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.402
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.1
_refine_diff_density_max         0.286
_refine_diff_density_min         -0.227
_refine_ls_extinction_coef       0.013(3)
_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   1.085
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     172
_refine_ls_number_reflns         2043
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.0637
_refine_ls_R_factor_gt           0.0437
_refine_ls_shift/su_max          0.012
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0729P)^2^+0.0661P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1142
_refine_ls_wR_factor_ref         0.125
_reflns_number_gt                1501
_reflns_number_total             2043
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            sx5028.cif
_cod_data_source_block           oxepine
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               2100222