1,1'-Dimethyl-4,4'-bipyridinium bis(perchlorate)
Dou, Yan-Li; Li, Zhi-Gang; Xu, Jing-Wei; Zhang, Wan-Xi; Acta Crystallographica Section E 63 (2007) o1874–o1875; doi:10.1107/S160053680701207X

data_2213051
_publ_section_title
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 1,1'-Dimethyl-4,4'-bipyridinium bis(perchlorate)
;
_journal_coeditor_code           WN2111
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              o1874
_journal_page_last               o1875
_journal_paper_doi               10.1107/S160053680701207X
_journal_volume                  63
_journal_year                    2007
_chemical_formula_iupac          'C12 H14 N2 2+, 2Cl O4 -'
_chemical_formula_moiety         'C12 H14 N2 2+, 2(Cl O4 -)'
_chemical_formula_sum            'C12 H14 Cl2 N2 O8'
_chemical_formula_weight         385.15
_chemical_name_systematic
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1,1'-Dimethyl-4,4'-bipyridinium bis(perchlorate)
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 96.972(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.7874(13)
_cell_length_b                   8.8352(19)
_cell_length_c                   15.125(3)
_cell_measurement_reflns_used    684
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      22.84
_cell_measurement_theta_min      2.71
_cell_volume                     767.7(3)
_computing_cell_refinement       SMART
_computing_data_collection       'SMART (Bruker, 1998)'
_computing_data_reduction        'SAINT-Plus (Bruker, 2003)'
_computing_molecular_graphics    'SHELXTL (Bruker, 1997)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX 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  0.0581
_diffrn_reflns_av_sigmaI/netI    0.0775
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            3934
_diffrn_reflns_theta_full        26.05
_diffrn_reflns_theta_max         26.05
_diffrn_reflns_theta_min         2.67
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.469
_exptl_absorpt_correction_T_max  0.9559
_exptl_absorpt_correction_T_min  0.8893
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SAINT-Plus; Bruker, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.666
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             396
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.341
_refine_diff_density_min         -0.370
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.068
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     110
_refine_ls_number_reflns         1500
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.1189
_refine_ls_R_factor_gt           0.0683
_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^)+(0.054P)^2^+0.9834P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1340
_refine_ls_wR_factor_ref         0.1521
_reflns_number_gt                961
_reflns_number_total             1500
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            wn2111.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               2213051
_cod_database_fobs_code          2213051