Crystal structure of diaqua-bis(2-methyl-1H-imidazole-4,5-dicarboxylato-O,N)nickel, [Ni(H2O)2(C6H5N2O4)2]
Hui-Liang Wen; Bo-Wen Lai; Xiao-Qin Wu; Xu-Liang Nie; Xiao-Bo Hu; Zeitschrift für Kristallographie - New Crystal Structures 224 (2009) 455–; doi:

data_8102468
_publ_section_title
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 Crystal structure of
 diaqua-bis(2-methyl-1H-imidazole-4,5-dicarboxylato-O,N)nickel,
 [Ni(H2O)2(C6H5N2O4)2]
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_journal_issue                   3
_journal_name_full
'Zeitschrift f\"ur Kristallographie - New Crystal Structures'
_journal_page_first              455
_journal_volume                  224
_journal_year                    2009
_chemical_formula_sum            'C12 H14 N4 Ni O10'
_chemical_formula_weight         432.98
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.7627(2)
_cell_length_b                   13.8370(4)
_cell_length_c                   16.5247(5)
_cell_measurement_reflns_used    3659
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      28.28
_cell_measurement_theta_min      2.47
_cell_volume                     1546.31(8)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0209
_diffrn_reflns_av_sigmaI/netI    0.0175
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            7033
_diffrn_reflns_theta_full        25.49
_diffrn_reflns_theta_max         25.49
_diffrn_reflns_theta_min         2.47
_exptl_absorpt_coefficient_mu    1.324
_exptl_absorpt_correction_T_max  0.8680
_exptl_absorpt_correction_T_min  0.7794
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.860
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             888
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.398
_refine_diff_density_min         -0.416
_refine_diff_density_rms         0.080
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     126
_refine_ls_number_reflns         1442
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0308
_refine_ls_R_factor_gt           0.0263
_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^)+(0.0482P)^2^+0.8333P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0745
_refine_ls_wR_factor_ref         0.0782
_reflns_number_gt                1243
_reflns_number_total             1442
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            1267-2651.cff
_cod_data_source_block           a
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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      Pbca
_cod_database_code               8102468