AreN,N-Dihydrodiazatetracene Derivatives Antiaromatic?
Shaobin Miao; Scott M. Brombosz; Paul V. R. Schleyer; Judy I. Wu; Stephen Barlow; Seth R. Marder; Kenneth I. Hardcastle; Uwe H. F. Bunz; Journal of the American Chemical Society 130 (2008) 7339–7344; doi:10.1021/ja077614p

data_4107858
_publ_section_title
;
 AreN,N-Dihydrodiazatetracene Derivatives Antiaromatic?
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7339
_journal_page_last               7344
_journal_paper_doi               10.1021/ja077614p
_journal_volume                  130
_journal_year                    2008
_chemical_formula_moiety         'C38 H50 N2 Si2'
_chemical_formula_sum            'C38 H50 N2 Si2'
_chemical_formula_weight         590.98
_chemical_name_systematic
;

 ?

;
_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                112.065(7)
_cell_angle_beta                 95.624(7)
_cell_angle_gamma                90.530(8)
_cell_formula_units_Z            2
_cell_length_a                   7.3968(7)
_cell_length_b                   13.8925(17)
_cell_length_c                   18.4277(18)
_cell_measurement_reflns_used    2601
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      25.33
_cell_measurement_theta_min      2.32
_cell_volume                     1744.3(3)
_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 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0925
_diffrn_reflns_av_sigmaI/netI    0.1085
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            16443
_diffrn_reflns_theta_full        23.82
_diffrn_reflns_theta_max         23.82
_diffrn_reflns_theta_min         1.58
_exptl_absorpt_coefficient_mu    0.129
_exptl_absorpt_correction_T_max  0.9923
_exptl_absorpt_correction_T_min  0.9382
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.125
_exptl_crystal_description       plate
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.505
_refine_diff_density_min         -0.375
_refine_diff_density_rms         0.095
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     495
_refine_ls_number_reflns         5353
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.2158
_refine_ls_R_factor_gt           0.1484
_refine_ls_shift/su_max          0.068
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1334P)^2^+14.6300P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3756
_refine_ls_wR_factor_ref         0.4149
_reflns_number_gt                2998
_reflns_number_total             5353
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja077614p-file001.cif
_cod_data_source_block           5a
_cod_database_code               4107858