Sequential oxidative transformation of tetraarylethylenes to 9,10-diarylphenanthrenes and dibenzo[g,p]chrysenes using DDQ as an oxidant.
Navale, Tushar S.; Thakur, Khushabu; Rathore, Rajendra; Organic letters 13 (2011) 1634–1637; doi:10.1021/ol200069c

data_1502011
_publ_section_title
;
 Sequential oxidative transformation of tetraarylethylenes to
 9,10-diarylphenanthrenes and dibenzo[g,p]chrysenes using DDQ as an
 oxidant.
;
_journal_issue                   7
_journal_name_full               'Organic letters'
_journal_page_first              1634
_journal_page_last               1637
_journal_paper_doi               10.1021/ol200069c
_journal_volume                  13
_journal_year                    2011
_chemical_formula_sum            'C26 H14 Br4'
_chemical_formula_weight         646.01
_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                81.715(2)
_cell_angle_beta                 76.668(3)
_cell_angle_gamma                79.787(3)
_cell_formula_units_Z            2
_cell_length_a                   9.5315(6)
_cell_length_b                   10.4853(5)
_cell_length_c                   11.9199(6)
_cell_measurement_reflns_used    7362
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      67
_cell_measurement_theta_min      4
_cell_volume                     1134.17(11)
_computing_cell_refinement       'SAINT v7.60A (Bruker, 2009)'
_computing_data_collection       'APEX2-2009.3-0 (Bruker, 2009)'
_computing_data_reduction        'TWINABS-2008/2 (Bruker, 2008)'
_computing_molecular_graphics    'XP v5.1 (Bruker, 1998)'
_computing_publication_material  'XCIF-2008/2 (Bruker, 2008)'
_computing_structure_refinement  'SHELXL-2008/4(Bruker, 2008)'
_computing_structure_solution    'XS/SHELXTL-2008/4 (Bruker, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.922
_diffrn_measurement_device_type  'Bruker APEX2 CCD detector'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0485
_diffrn_reflns_av_sigmaI/netI    0.0409
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            12663
_diffrn_reflns_theta_full        67.41
_diffrn_reflns_theta_max         67.41
_diffrn_reflns_theta_min         3.83
_exptl_absorpt_coefficient_mu    8.737
_exptl_absorpt_correction_T_max  0.6222
_exptl_absorpt_correction_T_min  0.1022
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
 TWINABS. Program for empirical absorption correction of
 area-detector data for twinned crystals. 
 University of Goetingen. Germany.  Sheldrick, G. M. 2007
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.892
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             620
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.997
_refine_diff_density_min         -0.698
_refine_diff_density_rms         0.149
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.127
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     272
_refine_ls_number_reflns         3774
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.127
_refine_ls_R_factor_all          0.0422
_refine_ls_R_factor_gt           0.0407
_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^)+(0.0690P)^2^+2.5630P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1173
_refine_ls_wR_factor_ref         0.1195
_reflns_number_gt                3660
_reflns_number_total             3774
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol200069c_si_001.cif
_cod_data_source_block           raj15t5
_cod_database_code               1502011