Crystal structure of bis(2,9-dimethyl-1,10-phenanthrolinium) dichromate dihydrate, [C14H13N2]2[Cr2O7] · 2H2O
Hai-Xing Liu; Zeitschrift für Kristallographie - New Crystal Structures 224 (2009) 717–; doi:

data_8102579
_publ_section_title
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 Crystal structure of bis(2,9-dimethyl-1,10-phenanthrolinium)
 dichromate dihydrate, [C14H13N2]2[Cr2O7] &#x00B7; 2H2O
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_journal_issue                   4
_journal_name_full
'Zeitschrift f\"ur Kristallographie - New Crystal Structures'
_journal_page_first              717
_journal_volume                  224
_journal_year                    2009
_chemical_formula_sum            'C28 H30 Cr2 N4 O9'
_chemical_formula_weight         670.56
_chemical_name_systematic
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Crystal structure of 2,9-dimethyl-1,10-phenanthroline chromate, 
2(C~14~H~12~N~2~)(Cr~2~O~7~) 2(H~2~O) 2H 
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_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 120.600(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   24.268(2)
_cell_length_b                   6.8564(8)
_cell_length_c                   19.9561(18)
_cell_measurement_reflns_used    2067
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      28.124
_cell_measurement_theta_min      2.172
_cell_volume                     2858.1(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0336
_diffrn_reflns_av_sigmaI/netI    0.0379
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            6805
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         1.95
_exptl_absorpt_coefficient_mu    0.822
_exptl_absorpt_correction_T_max  0.7675
_exptl_absorpt_correction_T_min  0.7087
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.558
_exptl_crystal_density_meas      1.244
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocky
_exptl_crystal_F_000             1384
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.34
_refine_diff_density_max         0.321
_refine_diff_density_min         -0.372
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.018
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     198
_refine_ls_number_reflns         2489
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.0629
_refine_ls_R_factor_gt           0.0391
_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^)+(0.0481P)^2^+5.5690P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0951
_refine_ls_wR_factor_ref         0.1121
_reflns_number_gt                1765
_reflns_number_total             2489
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1267-2797.cff
_cod_data_source_block           090818
_cod_depositor_comments
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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 1555 2011-01-17 13:19:09Z saulius 
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_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               8102579