Diethyl 1,4-dioxo-1,2,2a,3,4,10b-hexahydro-5<i>H</i>,10<i>H</i>-2,3,4a,10a-tetraazabenzo[<i>g</i>]cyclopenta[<i>cd</i>]azulene-2a,10b-dicarboxylate
Qin, Jing; Acta Crystallographica Section E 65 (2009) o1100–; doi:10.1107/S1600536809014548

data_2221770
_publ_section_title
;Diethyl
 1,4-dioxo-1,2,2a,3,4,10b-hexahydro-5<i>H</i>,10<i>H</i>-2,3,4a,10a-tetraazabenzo[<i>g</i>]cyclopenta[<i>cd</i>]azulene-2a,10b-dicarboxylate
;
_journal_coeditor_code           NC2142
_journal_issue                   5
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1100
_journal_paper_doi               10.1107/S1600536809014548
_journal_volume                  65
_journal_year                    2009
_chemical_formula_moiety         'C18 H20 N4 O6'
_chemical_formula_sum            'C18 H20 N4 O6'
_chemical_formula_weight         388.38
_chemical_name_systematic
;
Diethyl 1,4-dioxo-1,2,2a,3,4,10b-hexahydro-5<i>H</i>,10<i>H</i>-2,3,4a,10a-
tetraazabenzo[g]cyclopenta[cd]azulene-2a,10b-dicarboxylate
;
_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                93.1550(10)
_cell_angle_beta                 96.0560(10)
_cell_angle_gamma                112.3970(10)
_cell_formula_units_Z            2
_cell_length_a                   8.1394(5)
_cell_length_b                   9.4425(5)
_cell_length_c                   13.3576(8)
_cell_measurement_reflns_used    3262
_cell_measurement_temperature    294(2)
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.35
_cell_volume                     938.80(9)
_computing_cell_refinement       'SAINT (Bruker, 2001)'
_computing_data_collection       'SMART (Bruker, 2001)'
_computing_data_reduction        'SAINT (Bruker, 2001)'
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.984
_diffrn_measurement_device_type  'Bruker SMART 4K 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  0.0202
_diffrn_reflns_av_sigmaI/netI    0.0303
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            7700
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.54
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.105
_exptl_absorpt_correction_T_max  0.9891
_exptl_absorpt_correction_T_min  0.9764
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1997)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.374
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             408
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.275
_refine_diff_density_min         -0.198
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     261
_refine_ls_number_reflns         3624
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0588
_refine_ls_R_factor_gt           0.0493
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0741P)^2^+0.3055P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1334
_refine_ls_wR_factor_ref         0.1439
_reflns_number_gt                3028
_reflns_number_total             3624
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            nc2142.cif
_cod_data_source_block           I
_cod_database_code               2221770
_cod_database_fobs_code          2221770