Novel tetranuclear copper |2 + 4| cubanes resulting from unprecedented C-O bond formation cum dearomatization.
Kumar, Amit; Pandey, Rampal; Gupta, Rakesh Kumar; Dubey, Mrigendra; Pandey, Daya Shankar; Dalton transactions (Cambridge, England : 2003) 43 (2014) 13169–13173; doi:10.1039/c4dt01887g

data_7031644
_publ_section_title
;
 Novel tetranuclear copper |2 + 4| cubanes resulting from unprecedented
 C-O bond formation cum dearomatization.
;
_journal_issue                   35
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              13169
_journal_page_last               13173
_journal_paper_doi               10.1039/c4dt01887g
_journal_volume                  43
_journal_year                    2014
_chemical_absolute_configuration syn
_chemical_compound_source        Synthesized
_chemical_formula_moiety         ' C56 H72 Cu4 N8 O8, 4(O)'
_chemical_formula_sum            'C56 H72 Cu4 N8 O12'
_chemical_formula_weight         1303.38
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_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                 103.991(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   25.6867(6)
_cell_length_b                   9.5991(2)
_cell_length_c                   25.3877(7)
_cell_measurement_temperature    292(2)
_cell_volume                     6074.1(3)
_computing_cell_refinement       CrysAlisPro
_computing_data_collection       'Bruker APEX II (kappa 4)'
_computing_data_reduction        SHELXL
_computing_molecular_graphics    wingx
_computing_publication_material  wingx
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SHELXL
_diffrn_ambient_temperature      292(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.995
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0554
_diffrn_reflns_av_sigmaI/netI    0.0458
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -32
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            37329
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         26.48
_diffrn_reflns_theta_min         2.27
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    1.446
_exptl_absorpt_correction_T_max  0.7608
_exptl_absorpt_correction_T_min  0.5955
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sortav (Blessing 1995)'
_exptl_crystal_colour            Black
_exptl_crystal_density_diffrn    1.425
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             2704
_exptl_crystal_recrystallization_method Methanol
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.630
_refine_diff_density_min         -0.620
_refine_diff_density_rms         0.137
_refine_ls_extinction_coef       0.00000
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     368
_refine_ls_number_reflns         6244
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0738
_refine_ls_R_factor_gt           0.0444
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0544P)^2^+14.2025P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1106
_refine_ls_wR_factor_ref         0.1290
_reflns_number_gt                4453
_reflns_number_total             6244
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4dt01887g2.cif
_cod_data_source_block           2
_cod_depositor_comments
'Adding full bibliography for 7031640--7031645.cif.'
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7031644