The <i>m</i>-phenylene-bridged bis-oxazole 4,4',5,5'-tetraphenyl-2,2'-<i>m</i>-phenylenedi-1,3-oxazole and its bulkily substituted analogue 4,4',5,5'-tetrakis(4-<i>tert</i>-butylphenyl)-2,2'-<i>m</i>-phenylenedi-1,3-oxazole
Hübscher, Jörg; Felsmann, Marika; Seichter, Wilhelm; Weber, Edwin; Acta Crystallographica Section C 66 (2010) o623–o626; doi:10.1107/S0108270110045725

data_2017904
_publ_section_title
;
 The <i>m</i>-phenylene-bridged bis-oxazole
 4,4',5,5'-tetraphenyl-2,2'-<i>m</i>-phenylenedi-1,3-oxazole and its
 bulkily substituted analogue
 4,4',5,5'-tetrakis(4-<i>tert</i>-butylphenyl)-2,2'-<i>m</i>-phenylenedi-1,3-oxazole
;
_journal_coeditor_code           SU3052
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              o623
_journal_page_last               o626
_journal_paper_doi               10.1107/S0108270110045725
_journal_volume                  66
_journal_year                    2010
_chemical_formula_iupac          'C52 H56 N2 O2'
_chemical_formula_moiety         'C52 H56 N2 O2'
_chemical_formula_sum            'C52 H56 N2 O2'
_chemical_formula_weight         740.99
_chemical_name_systematic
;
4,4',5,5'-tetrakis(4-<i>tert</i>-butylphenyl)-2,2'-<i>m</i>-phenylenedi-
1,3-oxazole
;
_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           SHELXL97
_cell_angle_alpha                91.593(2)
_cell_angle_beta                 96.918(2)
_cell_angle_gamma                108.463(2)
_cell_formula_units_Z            2
_cell_length_a                   10.3121(3)
_cell_length_b                   11.1215(3)
_cell_length_c                   19.8676(6)
_cell_measurement_reflns_used    5548
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      23.08
_cell_measurement_theta_min      2.21
_cell_volume                     2140.25(11)
_computing_cell_refinement       'SAINT (Bruker, 2007)'
_computing_data_collection       'APEX2 (Bruker, 2007)'
_computing_data_reduction        'SAINT (Bruker, 2007)'
_computing_molecular_graphics    'ORTEP-3 (Farrugia, 1997)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'Nonius Kappa APEXII CCD area-detector'
_diffrn_measurement_method       '\f and \w'
_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  0.0443
_diffrn_reflns_av_sigmaI/netI    0.0678
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            33601
_diffrn_reflns_theta_full        27.10
_diffrn_reflns_theta_max         27.10
_diffrn_reflns_theta_min         1.03
_diffrn_standards_decay_%        1
_exptl_absorpt_coefficient_mu    0.069
_exptl_absorpt_correction_T_max  0.9884
_exptl_absorpt_correction_T_min  0.9783
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.150
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             796
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.17
_refine_diff_density_max         0.364
_refine_diff_density_min         -0.331
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     517
_refine_ls_number_reflns         9309
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.1165
_refine_ls_R_factor_gt           0.0569
_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^)+(0.0935P)^2^+0.1269P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1439
_refine_ls_wR_factor_ref         0.1801
_reflns_number_gt                5281
_reflns_number_total             9309
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            su3052.cif
_cod_data_source_block           II
_cod_database_code               2017904
_cod_database_fobs_code          2017904