<i>cis</i>-[4a]-<i>cisoid</i>-[4a,4b]-<i>cis</i>-[4b]-1,3,4b,5,7,8b-Hexamethylperhydro-1,3,5,7-tetraazabiphenylene-2,4,6,8-tetraone
Näther, Christian; Krüger, Oliver; Wille, Uta; Acta Crystallographica Section E 58 (2002) o405–o406; doi:10.1107/S1600536802004452

data_2201021
_publ_section_title
<i>cis</i>-[4a]-<i>cisoid</i>-[4a,4b]-<i>cis</i>-[4b]-1,3,4b,5,7,8b-Hexamethylperhydro-1,3,5,7-tetraazabiphenylene-2,4,6,8-tetraone
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o405
_journal_page_last               o406
_journal_paper_doi               10.1107/S1600536802004452
_journal_volume                  58
_journal_year                    2002
_chemical_formula_iupac          'C14 H20 N4 O4'
_chemical_formula_moiety         'C14 H20 N4 O4'
_chemical_formula_sum            'C14 H20 N4 O4'
_chemical_formula_weight         308.34
_chemical_name_common
;
cis-[4a]-cisoid-[4a,4b]-cis-[4b]-1,3,4b,5,7,8b-Hexamethylperhydro-1,3,5,7-
tetraazabiphenylene-2,4,6,8-tetraone
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 104.445(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.4422(6)
_cell_length_b                   14.0159(11)
_cell_length_c                   12.7803(8)
_cell_measurement_reflns_used    8000
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      25
_cell_measurement_theta_min      12.5
_cell_volume                     1464.42(19)
_computing_cell_refinement       'IPDS Program Package'
_computing_data_collection       'IPDS Program Package (Stoe & Cie, 1998)'
_computing_data_reduction        'IPDS Program Package'
_computing_molecular_graphics    'XP in SHELXTL (Bruker, 1998)'
_computing_publication_material  'CIFTAB in SHELXL97'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      170(2)
_diffrn_measured_fraction_theta_full 0.959
_diffrn_measured_fraction_theta_max 0.959
_diffrn_measurement_device_type  'Stoe Imaging Plate Diffraction System'
_diffrn_measurement_method       \f
_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  0.0319
_diffrn_reflns_av_sigmaI/netI    0.0202
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            13199
_diffrn_reflns_theta_full        28.09
_diffrn_reflns_theta_max         28.09
_diffrn_reflns_theta_min         2.88
_diffrn_standards_decay_%        none
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.104
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.399
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'irregular block'
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.4
_exptl_crystal_size_mid          0.4
_exptl_crystal_size_min          0.3
_refine_diff_density_max         0.223
_refine_diff_density_min         -0.184
_refine_ls_extinction_coef       0.062(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL97
_refine_ls_goodness_of_fit_ref   1.038
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     206
_refine_ls_number_reflns         3425
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0484
_refine_ls_R_factor_gt           0.0447
_refine_ls_shift/su_max          <0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w = 1/[\s^2^(Fo^2^)+(0.0703P)^2^+0.4649P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1194
_refine_ls_wR_factor_ref         0.1233
_reflns_number_gt                3097
_reflns_number_total             3425
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bt6119.cif
_cod_data_source_block           I
_cod_original_cell_volume        1464.42(18)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2201021
_cod_database_fobs_code          2201021