Novel "Potentially Antiaromatic", Acidichromic Quinonediimines with Tunable Delocalization of Their 6π-Electron Subunits
Olivier Siri; Pierre Braunstein; Marie-Madeleine Rohmer; Marc Bénard; Richard Welter; Journal of the American Chemical Society 125 (2003) 13793–13803; doi:10.1021/ja035463u

data_4114331
_publ_contact_author_address
;
Institut Le Bel, rue Blaise Pascal, 67000 STRASBOURG, FRANCE
;
_publ_contact_author_email       braunst@chimie.u-strasbg.fr
_publ_contact_author_fax         0390241322
_publ_contact_author_name
;
Pierre Braunstein 
;
_publ_contact_author_phone       0390241308
_publ_section_title
;
 Novel "Potentially Antiaromatic", Acidichromic Quinonediimines with
 Tunable Delocalization of Their 6\p-Electron Subunits
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13793
_journal_page_last               13803
_journal_paper_doi               10.1021/ja035463u
_journal_volume                  125
_journal_year                    2003
_chemical_formula_moiety         'C26 H49 N4, B F4'
_chemical_formula_sum            'C26 H49 B F4 N4'
_chemical_formula_weight         504.50
_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                90.000(5)
_cell_angle_beta                 96.949(5)
_cell_angle_gamma                90.000(5)
_cell_formula_units_Z            4
_cell_length_a                   10.944(5)
_cell_length_b                   22.920(5)
_cell_length_c                   12.172(5)
_cell_measurement_reflns_used    29000
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      29.1
_cell_measurement_theta_min      1.4
_cell_volume                     3031(2)
_computing_cell_refinement       'Denzo (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo (Nonius B.V., 1998)'
_computing_molecular_graphics    'PLATON 98 (Spek, 1998)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       '\p scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.3132
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            8067
_diffrn_reflns_theta_full        29.06
_diffrn_reflns_theta_max         29.06
_diffrn_reflns_theta_min         2.45
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.106
_exptl_crystal_description       prism
_exptl_crystal_F_000             1096
_exptl_crystal_size_max          0.13
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.553
_refine_diff_density_min         -0.274
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.853
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     314
_refine_ls_number_reflns         8066
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      0.853
_refine_ls_R_factor_all          0.3093
_refine_ls_R_factor_gt           0.0941
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0751P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1631
_refine_ls_wR_factor_ref         0.2358
_reflns_number_gt                5096
_reflns_number_total             8066
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja035463usi20030704_044358.cif
_cod_data_source_block           5.HBF4
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4114331