Electronic Structure of Ni2E2 Complexes (E = S, Se, Te) and a Global Analysis of M2E2 Compounds: A Case for Quantized E2(n-) Oxidation Levels with n = 2, 3, or 4.
Yao, Shu A.; Martin-Diaconescu, Vlad; Infante, Ivan; Lancaster, Kyle M.; Götz, Andreas W; DeBeer, Serena; Berry, John F.; Journal of the American Chemical Society 137 (2015) 4993–5011; doi:10.1021/ja511607j

data_4123561
_publ_section_title
;
 Electronic Structure of Ni2E2 Complexes (E = S, Se, Te) and a Global
 Analysis of M2E2 Compounds: A Case for Quantized E2(n-) Oxidation Levels
 with n = 2, 3, or 4.
;
_journal_issue                   15
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4993
_journal_page_last               5011
_journal_paper_doi               10.1021/ja511607j
_journal_volume                  137
_journal_year                    2015
_chemical_formula_moiety         'C54 H88 Co Ni2 Se2'
_chemical_formula_sum            'C54 H88 Co Ni2 Se2'
_chemical_formula_weight         1071.51
_chemical_name_systematic
; 

 ? 

;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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                 100.3970(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   21.2558(5)
_cell_length_b                   11.8529(3)
_cell_length_c                   21.0283(5)
_cell_measurement_reflns_used    999
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.61
_cell_measurement_theta_min      2.28
_cell_volume                     5210.9(2)
_computing_cell_refinement       'SAINT Ver. 7.24A (Bruker-AXS, 2007)'
_computing_data_collection       'APEX2 Ver. 2.1-4 (Bruker-AXS, 2009)'
_computing_data_reduction        'SAINT Ver. 7.24A'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXTL, OLEX2 (Dolomanov et al., 2009)'
_computing_structure_solution    'SHELXTL (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Bruker SMART APEX2 area detector'
_diffrn_measurement_method       '0.60\% \w and 0.6\% \f scans'
_diffrn_radiation_monochromator  'mirror optics'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0251
_diffrn_reflns_av_sigmaI/netI    0.0135
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -29
_diffrn_reflns_number            122347
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         29.61
_diffrn_reflns_theta_min         2.28
_diffrn_source                   'microfocus sealed X-ray tube'
_diffrn_source_type              'Incoatec I\ms'
_exptl_absorpt_coefficient_mu    2.460
_exptl_absorpt_correction_T_max  0.5585
_exptl_absorpt_correction_T_min  0.3968
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;

SADABS  (Bruker-AXS, 2007)

;
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.366
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2252
_exptl_crystal_size_max          0.46
_exptl_crystal_size_mid          0.43
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.401
_refine_diff_density_min         -0.236
_refine_diff_density_rms         0.048
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.013
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     558
_refine_ls_number_reflns         14581
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0227
_refine_ls_R_factor_gt           0.0186
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0235P)^2^+2.0700P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0464
_refine_ls_wR_factor_ref         0.0482
_reflns_number_gt                13140
_reflns_number_total             14581
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja511607j_si_001.cif
_cod_data_source_block           2red
_cod_depositor_comments
'Adding full bibliography for 4123556--4123563.cif.'
_cod_original_sg_symbol_Hall     '-P 2ybc     '
_cod_original_sg_symbol_H-M      'P 1 21/c 1  '
_cod_database_code               4123561