2,5-Dibenzoylbenzene-1,4-diaminium dichloride
Shui-Ping Deng; Shan Liu; Fei Yang; Ji-Ling Xu; Hong-Jun Zhu; Acta Crystallographica Section E 64 (2008) o387–o387; doi:10.1107/S1600536807068730

data_2217452
_publ_section_title
;
 2,5-Dibenzoylbenzene-1,4-diaminium dichloride
;
_journal_coeditor_code           CI2546
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o387
_journal_page_last               o387
_journal_paper_doi               10.1107/S1600536807068730
_journal_volume                  64
_journal_year                    2008
_chemical_formula_iupac          'C20 H18 N2 O2 2+, 2Cl -'
_chemical_formula_moiety         'C20 H18 N2 O2 2+, 2(Cl -)'
_chemical_formula_sum            'C20 H18 Cl2 N2 O2'
_chemical_formula_weight         389.26
_chemical_name_systematic
;
2,5-Dibenzoylbenzene-1,4-diaminium dichloride
;
_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                 104.46(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.373(3)
_cell_length_b                   5.1950(10)
_cell_length_c                   14.315(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      13
_cell_measurement_theta_min      9
_cell_volume                     891.0(4)
_computing_cell_refinement       'CAD-4 Software (Enraf--Nonius, 1985)'
_computing_data_collection       'CAD-4 Software (Enraf--Nonius, 1985)'
_computing_data_reduction        'XCAD4 (Harms & Wocadlo, 1995)'
_computing_molecular_graphics    'SHELXTL (Bruker, 2000)'
_computing_publication_material  'SHELXTL (Bruker, 2000)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Enraf--Nonius CAD-4'
_diffrn_measurement_method       \w/2\q
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0570
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            1754
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.95
_diffrn_standards_interval_count 200
_diffrn_standards_interval_time  2h
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.382
_exptl_absorpt_correction_T_max  0.9628
_exptl_absorpt_correction_T_min  0.8622
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details   '(North <i>et al.</i>,  1968)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.451
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             404
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.305
_refine_diff_density_min         -0.275
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     130
_refine_ls_number_reflns         1754
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.083
_refine_ls_R_factor_all          0.0834
_refine_ls_R_factor_gt           0.0548
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         <0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0704P)^2^+0.5685P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1388
_refine_ls_wR_factor_ref         0.1622
_reflns_number_gt                1232
_reflns_number_total             1754
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ci2546.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/n'
_cod_database_code               2217452
_cod_database_fobs_code          2217452