Diethyl 2,6-diisobutyl-4,8-dioxo-2,3,6,7-tetrahydro-1<i>H</i>,5<i>H</i>-2,3a,4a,6,7a,8a-hexaazacyclopenta[<i>def</i>]fluorene-8b,8c-dicarboxylate
Li, Yi-Tao; Guo, Qian-Ni; Acta Crystallographica Section E 62 (2006) o3463–o3464; doi:10.1107/S1600536806027620

data_2209788
_publ_section_title
;Diethyl
 2,6-diisobutyl-4,8-dioxo-2,3,6,7-tetrahydro-1<i>H</i>,5<i>H</i>-2,3a,4a,6,7a,8a-hexaazacyclopenta[<i>def</i>]fluorene-8b,8c-dicarboxylate
;
_journal_coeditor_code           CI2081
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o3463
_journal_page_last               o3464
_journal_paper_doi               10.1107/S1600536806027620
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'C22 H36 N6 O6'
_chemical_formula_moiety         'C22 H36 N6 O6'
_chemical_formula_sum            'C22 H36 N6 O6'
_chemical_formula_weight         480.57
_chemical_name_systematic
;
Diethyl 2,6-diisobutyl-4,8-dioxo-2,3,6,7-tetrahydro-1H,5H-2,3a,4a,6,7a,8a-
hexaazacyclopenta[def]fluorene-8b,8c-dicarboxylate
;
_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                 103.4760(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.7596(9)
_cell_length_b                   7.8469(5)
_cell_length_c                   24.4168(15)
_cell_measurement_reflns_used    6234
_cell_measurement_temperature    292(2)
_cell_measurement_theta_max      23.27
_cell_measurement_theta_min      2.55
_cell_volume                     2563.7(3)
_computing_cell_refinement       'SAINT (Bruker, 2000)'
_computing_data_collection       'SMART (Bruker, 2000)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Bruker, 2000)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      292(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker SMART CCD area-detector'
_diffrn_measurement_method       '\f and \w'
_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  0.0296
_diffrn_reflns_av_sigmaI/netI    0.0305
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            19253
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.72
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.9819
_exptl_absorpt_correction_T_min  0.9730
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2000)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.245
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1032
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.297
_refine_diff_density_min         -0.328
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     380
_refine_ls_number_reflns         5044
_refine_ls_number_restraints     40
_refine_ls_restrained_S_all      1.128
_refine_ls_R_factor_all          0.0774
_refine_ls_R_factor_gt           0.0574
_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^)+(0.0971P)^2^+0.2921P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1624
_refine_ls_wR_factor_ref         0.1759
_reflns_number_gt                3644
_reflns_number_total             5044
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ci2081.cif
_cod_data_source_block           I
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2209788
_cod_database_fobs_code          2209788