Tetraphenylhexaazaanthracenes: 16π Weakly Antiaromatic Species with Singlet Ground States.
Constantinides, Christos P.; Zissimou, Georgia A.; Berezin, Andrey A.; Ioannou, Theodosia A.; Manoli, Maria; Tsokkou, Demetra; Theodorou, Eleni; Hayes, Sophia C.; Koutentis, Panayiotis A.; Organic letters 17 (2015) 4026–4029; doi:10.1021/acs.orglett.5b01923

data_1529885
_publ_section_title
;
 Tetraphenylhexaazaanthracenes: 16\p Weakly Antiaromatic Species with
 Singlet Ground States.
;
_journal_issue                   16
_journal_name_full               'Organic letters'
_journal_page_first              4026
_journal_page_last               4029
_journal_paper_doi               10.1021/acs.orglett.5b01923
_journal_volume                  17
_journal_year                    2015
_chemical_formula_moiety         'C32 H22 N6'
_chemical_formula_sum            'C32 H22 N6'
_chemical_formula_weight         490.56
_chemical_name_systematic
; 
 ? 
;
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 99.174(9)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.4407(11)
_cell_length_b                   21.762(2)
_cell_length_c                   8.4346(8)
_cell_measurement_reflns_used    1488
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      67.2376
_cell_measurement_theta_min      3.3282
_cell_volume                     2435.5(4)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 10.4223
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'SuperNova (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0377
_diffrn_reflns_av_sigmaI/netI    0.0652
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            8791
_diffrn_reflns_theta_full        67.00
_diffrn_reflns_theta_max         67.00
_diffrn_reflns_theta_min         3.33
_exptl_absorpt_coefficient_mu    0.645
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.79899
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Empirical absorption correction (CrysAlis RED, Oxford Diffraction)'
_exptl_crystal_colour            brown-red
_exptl_crystal_density_diffrn    1.338
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rods
_exptl_crystal_F_000             1024
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.470
_refine_diff_density_min         -0.226
_refine_diff_density_rms         0.049
_refine_ls_extinction_coef       0.00045(18)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.919
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     344
_refine_ls_number_reflns         4289
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.919
_refine_ls_R_factor_all          0.1282
_refine_ls_R_factor_gt           0.0622
_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^)+(0.1038P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1594
_refine_ls_wR_factor_ref         0.2166
_reflns_number_gt                2100
_reflns_number_total             4289
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5b01923_si_002.cif
_cod_data_source_block           shelxl
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 3271 2015-04-21 07:52:19Z andrius 
;
_cod_original_cell_volume        2435.6(4)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1529885