Attempted generation of the potentially aromatic 6,7-diphenyldibenzo[e,g][1,4]diazocine dianion leads with profound rearrangement to the isomeric n-(2-amino-1,2-diphenylethenyl)carbazole dianions.
Eisch, John J.; Manchanayakage, Renuka N.; Rheingold, Arnold L.; Organic letters 11 (2009) 4060–4063; doi:10.1021/ol901503s

data_1504102
_publ_section_title
;
 Attempted generation of the potentially aromatic
 6,7-diphenyldibenzo[e,g][1,4]diazocine dianion leads with profound
 rearrangement to the isomeric n-(2-amino-1,2-diphenylethenyl)carbazole
 dianions.
;
_journal_issue                   18
_journal_name_full               'Organic letters'
_journal_page_first              4060
_journal_page_last               4063
_journal_paper_doi               10.1021/ol901503s
_journal_volume                  11
_journal_year                    2009
_chemical_formula_sum            'C26 H20 N2'
_chemical_formula_weight         360.44
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   10.0514(3)
_cell_length_b                   10.6807(3)
_cell_length_c                   17.5467(5)
_cell_measurement_reflns_used    5563
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      65.16
_cell_measurement_theta_min      4.85
_cell_volume                     1883.74(9)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_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      100(2)
_diffrn_measured_fraction_theta_full 0.978
_diffrn_measured_fraction_theta_max 0.978
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0271
_diffrn_reflns_av_sigmaI/netI    0.0293
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            8369
_diffrn_reflns_theta_full        67.50
_diffrn_reflns_theta_max         67.50
_diffrn_reflns_theta_min         4.85
_exptl_absorpt_coefficient_mu    0.573
_exptl_absorpt_correction_T_max  0.9039
_exptl_absorpt_correction_T_min  0.8561
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.271
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             760
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.248
_refine_diff_density_min         -0.251
_refine_diff_density_rms         0.032
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     253
_refine_ls_number_reflns         3059
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0353
_refine_ls_R_factor_gt           0.0320
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0522P)^2^+0.1650P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0799
_refine_ls_wR_factor_ref         0.0824
_reflns_number_gt                2867
_reflns_number_total             3059
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol901503s_si_001.cif
_cod_data_source_block           eisch4
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               1504102