Substituted 5,6,11,12-tetradehydrodibenzo[a,e]cyclooctenes: syntheses, properties, and DFT studies of substituted Sondheimer-Wong diynes.
Xu, Feng; Peng, Lifen; Shinohara, Kenta; Morita, Takamoto; Yoshida, Suguru; Hosoya, Takamitsu; Orita, Akihiro; Otera, Junzo; The Journal of organic chemistry 79 (2014) 11592–11608; doi:10.1021/jo502248p

data_4030641
_publ_section_title
;
 Substituted 5,6,11,12-tetradehydrodibenzo[a,e]cyclooctenes: syntheses,
 properties, and DFT studies of substituted Sondheimer-Wong diynes.
;
_journal_issue                   23
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              11592
_journal_page_last               11608
_journal_paper_doi               10.1021/jo502248p
_journal_volume                  79
_journal_year                    2014
_chemical_formula_moiety         'C20 H14 N2'
_chemical_formula_sum            'C20 H14 N2'
_chemical_formula_weight         564.66
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                99.921(2)
_cell_angle_beta                 105.683(2)
_cell_angle_gamma                96.551(2)
_cell_formula_units_Z            4
_cell_length_a                   9.3495(5)
_cell_length_b                   10.1654(6)
_cell_length_c                   16.1135(9)
_cell_measurement_reflns_used    21376
_cell_measurement_temperature    122(2)
_cell_measurement_theta_max      31.57
_cell_measurement_theta_min      2.21
_cell_volume                     1431.40(14)
_computing_cell_refinement       'APEX2 v.2013.6-2, Bruker/Nonius'
_computing_data_collection       'APEX2 v.2013.6-2, Bruker/Nonius'
_computing_data_reduction        'APEX2 v.2013.6-2, Bruker/Nonius'
_computing_molecular_graphics    'ORTEP-II (Johnson, 1976)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      122(2)
_diffrn_measured_fraction_theta_full 0.849
_diffrn_measured_fraction_theta_max 0.849
_diffrn_measurement_device_type  'Bruker D8 Venture'
_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  0.0729
_diffrn_reflns_av_sigmaI/netI    0.1060
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            21376
_diffrn_reflns_theta_full        31.57
_diffrn_reflns_theta_max         31.57
_diffrn_reflns_theta_min         2.21
_exptl_absorpt_coefficient_mu    0.078
_exptl_absorpt_correction_type   none
_exptl_crystal_density_diffrn    1.310
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             592
_refine_diff_density_max         0.311
_refine_diff_density_min         -0.315
_refine_diff_density_rms         0.065
_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     397
_refine_ls_number_reflns         8122
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.1353
_refine_ls_R_factor_gt           0.0605
_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^)+(0.0543P)^2^+0.2666P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1140
_refine_ls_wR_factor_ref         0.1389
_reflns_number_gt                4771
_reflns_number_total             8122
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo502248p_si_001.cif
_cod_data_source_block           mo_d8v272_0m
_cod_database_code               4030641