The elusive [Ni(H~2~O)~2~(15-crown-5)]^2+^ cation and related co-crystals of nickel(II) hydrates and 15-crown-5
Siegler, Maxime A.; Parkin, Sean; Selegue, John P.; Brock, Carolyn Pratt; Acta Crystallographica Section B 64 (2008) 725–737; doi:10.1107/S0108768108034058

data_2104236
_publ_section_title
;
 The elusive [Ni(H~2~O)~2~(15-crown-5)]^2+^ cation and related
 co-crystals of nickel(II) hydrates and 15-crown-5
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              725
_journal_page_last               737
_journal_paper_doi               10.1107/S0108768108034058
_journal_volume                  64
_journal_year                    2008
_chemical_formula_moiety         'C10 H20 O5, H12 Ni O6 2+, 2(N O3 1-), H2 O'
_chemical_formula_sum            'C10 H34 N2 Ni O18'
_chemical_formula_weight         529.10
_chemical_name_common
'hexaquanickel(II) nitrate (15-crown-5) monohydrate'
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                89.710(10)
_cell_angle_beta                 122.530(10)
_cell_angle_gamma                83.580(10)
_cell_formula_units_Z            6
_cell_length_a                   16.0360(10)
_cell_length_b                   24.765(2)
_cell_length_c                   10.1630(10)
_cell_measurement_reflns_used    11233
_cell_measurement_temperature    90.0(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.00
_cell_volume                     3371.2(6)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 2006)'
_computing_data_collection       'COLLECT (Nonius, 1999)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 2006)'
_computing_molecular_graphics    'XP in SHELXTL (Mercury (Macrae et al., 2008)'
_computing_publication_material  'SHELX-97 and local procedures'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      90.0(2)
_diffrn_detector_area_resol_mean 18
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Nonius KappaCCD diffractometer'
_diffrn_measurement_method       '\w scans at fixed \c = 55\%'
_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    0.1238
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       32
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            15437
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.52
_diffrn_standards_decay_%        <2
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.949
_exptl_absorpt_correction_T_max  0.9111
_exptl_absorpt_correction_T_min  0.8329
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Scalepack (Otwinowski & Minor, 2006)'
_exptl_crystal_colour            'pale green'
_exptl_crystal_density_diffrn    1.564
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'irregular block'
_exptl_crystal_F_000             1680
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         2.076
_refine_diff_density_min         -0.736
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     980
_refine_ls_number_reflns         15437
_refine_ls_number_restraints     71
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.1485
_refine_ls_R_factor_gt           0.0641
_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^)+(0.0579P)^2^+6.1685P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1313
_refine_ls_wR_factor_ref         0.1589
_reflns_number_gt                8504
_reflns_number_total             15437
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            bs5068.cif
_cod_data_source_block           2b
_cod_database_code               2104236
_cod_database_fobs_code          2104236