Diethyl 6,9-dibromo-1,4-dioxo-1,2,3,4,5,10-hexahydro-2,3,4a,10a-tetraazabenzo[<i>g</i>]cyclopenta[<i>cd</i>]azulene-2a,10b-dicarboxylate
Nengfang She; Huizhen Guo; Zhiguo Wang; Anxin Wu; Acta Crystallographica Section E 61 (2005) o2549–o2550; doi:10.1107/S1600536805022075

data_2206454
_publ_section_title
;Diethyl
 6,9-dibromo-1,4-dioxo-1,2,3,4,5,10-hexahydro-2,3,4a,10a-tetraazabenzo[<i>g</i>]cyclopenta[<i>cd</i>]azulene-2a,10b-dicarboxylate
;
_journal_coeditor_code           HK6024
_journal_issue                   8
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o2549
_journal_page_last               o2550
_journal_paper_doi               10.1107/S1600536805022075
_journal_volume                  61
_journal_year                    2005
_chemical_formula_iupac          'C18 H18 Br2 N4 O6'
_chemical_formula_moiety         'C18 H18 Br2 N4 O6'
_chemical_formula_sum            'C18 H18 Br2 N4 O6'
_chemical_formula_weight         546.18
_chemical_name_systematic
;
Diethyl
6,9-dibromo-1,4-dioxo-1,2,3,4,5,10-hexahydro-2,3,4a,10a-tetraazabenzo[g]
cyclopenta[cd]azulene-2a,10b-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                 108.371(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.0665(11)
_cell_length_b                   10.3050(10)
_cell_length_c                   17.4969(17)
_cell_measurement_reflns_used    6947
_cell_measurement_temperature    292(2)
_cell_measurement_theta_max      23.98
_cell_measurement_theta_min      2.33
_cell_volume                     2064.8(3)
_computing_cell_refinement       'SAINT (Bruker, 1999)'
_computing_data_collection       'SMART (Bruker, 1997)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Bruker, 2001)'
_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 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0282
_diffrn_reflns_av_sigmaI/netI    0.0266
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            14418
_diffrn_reflns_theta_full        25.05
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         1.78
_exptl_absorpt_coefficient_mu    3.970
_exptl_absorpt_correction_T_max  0.304
_exptl_absorpt_correction_T_min  0.238
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Sheldrick, 1996)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.757
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             1088
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         1.017
_refine_diff_density_min         -1.091
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.030
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     279
_refine_ls_number_reflns         3656
_refine_ls_number_restraints     22
_refine_ls_restrained_S_all      1.077
_refine_ls_R_factor_all          0.0714
_refine_ls_R_factor_gt           0.0575
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0709P)^2^+5.0818P] where P = (Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1452
_refine_ls_wR_factor_ref         0.1571
_reflns_number_gt                2925
_reflns_number_total             3656
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            hk6024.cif
_cod_data_source_block           I
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2206454
_cod_database_fobs_code          2206454