Radical Cascade Transformations of Tris(o-aryleneethynylenes) into Substituted Benzo[a]indeno[2,1-c]fluorenes
Igor V. Alabugin; Kerry Gilmore; Satish Patil; Mariappan Manoharan; Serguei V. Kovalenko; Ronald J. Clark; Ion Ghiviriga; Journal of the American Chemical Society 130 (2008) 11535–11545; doi:10.1021/ja8038213

data_4108248
_publ_section_title
;
 Radical Cascade Transformations of Tris(o-aryleneethynylenes) into
 Substituted Benzo[a]indeno[2,1-c]fluorenes
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              11535
_journal_page_last               11545
_journal_paper_doi               10.1021/ja8038213
_journal_volume                  130
_journal_year                    2008
_chemical_formula_moiety         'C24 H26 Si2'
_chemical_formula_sum            'C24 H26 Si2'
_chemical_formula_weight         370.63
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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            4
_cell_length_a                   11.0954(6)
_cell_length_b                   10.5677(6)
_cell_length_c                   19.0897(11)
_cell_measurement_reflns_used    7672
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.29
_cell_measurement_theta_min      2.82
_cell_volume                     2238.3(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0363
_diffrn_reflns_av_sigmaI/netI    0.0163
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            27618
_diffrn_reflns_theta_full        26.73
_diffrn_reflns_theta_max         26.73
_diffrn_reflns_theta_min         1.07
_exptl_absorpt_coefficient_mu    0.163
_exptl_absorpt_correction_T_max  0.981
_exptl_absorpt_correction_T_min  0.863
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.100
_exptl_crystal_density_meas      0
_exptl_crystal_description       retangular
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.23
_exptl_crystal_size_min          0.115
_refine_diff_density_max         0.364
_refine_diff_density_min         -0.262
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.362
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     122
_refine_ls_number_reflns         2374
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.362
_refine_ls_R_factor_all          0.0663
_refine_ls_R_factor_gt           0.0651
_refine_ls_shift/su_max          0.032
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0322P)^2^+2.1079P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1349
_refine_ls_wR_factor_ref         0.1356
_reflns_number_gt                2328
_reflns_number_total             2374
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja8038213-file004.cif
_cod_data_source_block           c:\frames\igor44a\igor44
_cod_original_sg_symbol_Hall     -P2ac2ab
_cod_database_code               4108248