Aromaticity and pi-bond covalency: Strong intermolecular covalent bonding interaction of a Kekule hydrocarbon with very large singlet biradical character
Akihiro Shimizu; Yasukazu Hirao; Kozo Matsumoto; Hiroyuki Kurata; Takashi Kubo; Mikio Uruichi; Kyuya Yakushi; Chem.Commun. 48 (2012) 5629–; doi:10.1039/c2cc31955a

data_7107763
_publ_section_title
;
 Aromaticity and pi-bond covalency: Strong intermolecular covalent bonding
 interaction of a Kekule hydrocarbon with very large singlet biradical
 character
;
_journal_name_full               Chem.Commun.
_journal_page_first              5629
_journal_paper_doi               10.1039/c2cc31955a
_journal_volume                  48
_journal_year                    2012
_chemical_formula_moiety         'C64 H36, 2(C7 H8)'
_chemical_formula_sum            'C78 H52'
_chemical_formula_weight         989.20
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_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                90.925(5)
_cell_angle_beta                 96.852(7)
_cell_angle_gamma                108.851(6)
_cell_formula_units_Z            1
_cell_length_a                   10.152(2)
_cell_length_b                   11.5617(18)
_cell_length_c                   11.940(2)
_cell_measurement_reflns_used    10866
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      55.0
_cell_measurement_theta_min      6.5
_cell_volume                     1314.6(4)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       PROCESS-AUTO
_computing_data_reduction        'teXsan Ver. 2.0'
_computing_publication_material  'teXsan Ver. 2.0'
_computing_structure_refinement  SHELXL97
_computing_structure_solution    DirectMethod
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  'Rigaku RAXIS-RAPID Imaging Plate'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0351
_diffrn_reflns_av_sigmaI/netI    0.0469
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            12898
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.27
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.250
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             520
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.324
_refine_diff_density_min         -0.209
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.185
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     380
_refine_ls_number_reflns         5918
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.185
_refine_ls_R_factor_all          0.0870
_refine_ls_R_factor_gt           0.0673
_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^)+(0.0438P)^2^+1.5783P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1930
_refine_ls_wR_factor_ref         0.2018
_reflns_number_gt                4281
_reflns_number_total             5918
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2cc31955a.txt
_cod_data_source_block           Ph4ADPL
_cod_original_sg_symbol_H-M      'P -1 '
_cod_database_code               7107763