4,8-Dibenzyl-2',4',6'-trinitrospiro[1,3-dioxaazulenium-2,1'-cyclohexadienide]
Borbulevych, Oleg Ya.; Antipin, Michail Yu.; Olekhnovich, Lev P.; Acta Crystallographica Section C 55 (1999) 2177–2179; doi:10.1107/S010827019901241X

data_2009220
_publ_section_title
4,8-Dibenzyl-2',4',6'-trinitrospiro[1,3-dioxaazulenium-2,1'-cyclohexadienide]
_journal_issue                   12
_journal_name_full               'Acta Crystallographica Section C'
_journal_page_first              2177
_journal_page_last               2179
_journal_paper_doi               10.1107/S010827019901241X
_journal_volume                  55
_journal_year                    1999
_chemical_formula_sum            'C27 H19 N3 O8'
_chemical_formula_weight         513.45
_chemical_name_systematic
;
Spiro(4,8-dibenzyl-1,3-dioxaazulenium-2,1'-2',4',6'-trinitrohexadienide)
;
_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'
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 94.74(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.311(5)
_cell_length_b                   12.877(7)
_cell_length_c                   19.806(10)
_cell_measurement_reflns_used    24
_cell_measurement_temperature    193(2)
_cell_measurement_theta_max      11
_cell_measurement_theta_min      10
_cell_volume                     2367(2)
_computing_cell_refinement       P3
_computing_data_collection       'P3 (Siemens, 1989)'
_computing_data_reduction        'PROFIT (Strel'tsov & Zavodnik, 1989)'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 1994)'
_diffrn_ambient_temperature      193(2)
_diffrn_measurement_device       'Syntex P2~1~/PC'
_diffrn_measurement_method       '\q/2\q scans'
_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  0.1008
_diffrn_reflns_av_sigmaI/netI    0.0970
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            4458
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         1.89
_diffrn_standards_decay_%        5
_diffrn_standards_interval_count 98
_diffrn_standards_number         2
_exptl_absorpt_coefficient_mu    0.108
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.441
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'square prism'
_exptl_crystal_F_000             1064
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.233
_refine_diff_density_min         -0.367
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   0.998
_refine_ls_goodness_of_fit_ref   1.225
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     343
_refine_ls_number_reflns         4117
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.138
_refine_ls_restrained_S_obs      1.225
_refine_ls_R_factor_all          0.1537
_refine_ls_R_factor_gt           0.0719
_refine_ls_shift/esd_mean        0.000
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0683P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1659
_refine_ls_wR_factor_ref         0.1211
_reflns_number_gt                2066
_reflns_number_total             4182
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bm1362.cif
_cod_data_source_block           tropoop
_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 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc w =
1/[\s^2^(Fo^2^)+(0.0683P)^2^] where P=(Fo^2^+2Fc^2^)/3' was changed
to 'calc'. New tag '_refine_ls_weighting_details' was created. The
value of the new tag was set to 'w = 1/[\s^2^(Fo^2^)+(0.0683P)^2^]
where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_cell_volume        2367.(2)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               2009220
_cod_database_fobs_code          2009220