Redetermination of <i>cis</i>,<i>cis</i>-1,2,3,4-tetraphenylbuta-1,3-diene
Bats, Jan W.; Urschel, Birgit; Acta Crystallographica Section E 62 (2006) o748–o750; doi:10.1107/S1600536806002078

data_2208125
_publ_section_title
;
 Redetermination of
 <i>cis</i>,<i>cis</i>-1,2,3,4-tetraphenylbuta-1,3-diene
;
_journal_coeditor_code           LH6582
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o748
_journal_page_last               o750
_journal_paper_doi               10.1107/S1600536806002078
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C28 H22'
_chemical_formula_moiety         'C28 H22'
_chemical_formula_sum            'C28 H22'
_chemical_formula_weight         358.46
_chemical_name_systematic
;
cis,cis-1,2,3,4-tetraphenylbuta-1,3-diene
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 96.380(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.7873(11)
_cell_length_b                   21.262(3)
_cell_length_c                   7.914(2)
_cell_measurement_reflns_used    119
_cell_measurement_temperature    162(2)
_cell_measurement_theta_max      23
_cell_measurement_theta_min      3
_cell_volume                     967.8(3)
_computing_cell_refinement       'SAINT (Siemens, 1995)'
_computing_data_collection       'SMART (Siemens, 1995)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Sheldrick, 1996)'
_computing_publication_material  'SHELXL97 '
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      162(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.958
_diffrn_measurement_device_type  'Siemens SMART 1K CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'noraml-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0341
_diffrn_reflns_av_sigmaI/netI    0.0263
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            16868
_diffrn_reflns_theta_full        31.70
_diffrn_reflns_theta_max         32.40
_diffrn_reflns_theta_min         1.92
_diffrn_standards_decay_%        0.0
_diffrn_standards_interval_time  1200
_diffrn_standards_number         232
_exptl_absorpt_coefficient_mu    0.069
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            pale_yellow
_exptl_crystal_density_diffrn    1.230
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             380
_exptl_crystal_size_max          0.55
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.361
_refine_diff_density_min         -0.208
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.098
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     171
_refine_ls_number_reflns         3325
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.098
_refine_ls_R_factor_all          0.0596
_refine_ls_R_factor_gt           0.0455
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.06P)^2^+0.2P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1139
_refine_ls_wR_factor_ref         0.1226
_reflns_number_gt                2678
_reflns_number_total             3325
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            lh6582.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2208125
_cod_database_fobs_code          2208125