Bis(4-aminopyridinium) dichromate(VI)
Trabelsi, Sonia; Roisnel, Thierry; Dhaouadi, Hassouna; Marouani, Houda; Acta Crystallographica Section E 70 (2014) m263–m264; doi:10.1107/S1600536814013579

data_2239686
_publ_section_title
;
 Bis(4-aminopyridinium) dichromate(VI)
;
_journal_coeditor_code           BH2500
_journal_issue                   7
_journal_name_full               'Acta Crystallographica Section E'
_journal_page_first              m263
_journal_page_last               m264
_journal_paper_doi               10.1107/S1600536814013579
_journal_volume                  70
_journal_year                    2014
_chemical_formula_iupac          '(C5 H7 N2)2 [Cr2 O7]'
_chemical_formula_moiety         '2(C5 H7 N2 +), Cr2 O7 2-'
_chemical_formula_sum            'C10 H14 Cr2 N4 O7'
_chemical_formula_weight         406.25
_chemical_name_systematic
;
Bis(4-aminopyridinium) dichromate(VI)
;
_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                 118.923(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   13.8505(4)
_cell_length_b                   16.2486(4)
_cell_length_c                   15.2586(4)
_cell_measurement_reflns_used    5472
_cell_measurement_temperature    150
_cell_measurement_theta_max      27.31
_cell_measurement_theta_min      2.68
_cell_volume                     3005.65(15)
_computing_cell_refinement       'SAINT (Bruker, 2006)'
_computing_data_collection       'APEX2 (Bruker, 2006)'
_computing_data_reduction        'SAINT (Bruker, 2006)'
_computing_molecular_graphics    'DIAMOND (Brandenburg & Putz, 2005)'
_computing_publication_material
;
WinGX (Farrugia, 2012) and <i>CRYSCAL</i> (T. Roisnel, local program)
;
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR97 (Altomare <i>et al.</i>, 1999)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEXII'
_diffrn_measurement_method       'CCD rotation images, thin slices'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0424
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            23461
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.93
_exptl_absorpt_coefficient_mu    1.488
_exptl_absorpt_correction_T_max  0.552
_exptl_absorpt_correction_T_min  0.469
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS; Bruker, 2006)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.796
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1648
_exptl_crystal_size_max          0.58
_exptl_crystal_size_mid          0.5
_exptl_crystal_size_min          0.4
_refine_diff_density_max         0.408
_refine_diff_density_min         -0.578
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     415
_refine_ls_number_reflns         6868
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.069
_refine_ls_R_factor_all          0.0469
_refine_ls_R_factor_gt           0.0349
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0409P)^2^+1.1738P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0914
_refine_ls_wR_factor_ref         0.0966
_reflns_number_gt                5506
_reflns_number_total             6868
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bh2500sup1.cif
_cod_data_source_block           I
_cod_original_cell_volume        3005.65(14)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2239686
_cod_database_fobs_code          2239686