Synthesis, crystal structure and magnetic properties of three unprecedented tri-nuclear and one very rare tetra-nuclear copper(II) Schiff-base complexes supported by mixed azido/phenoxo/nitrato or acetato bridges.
Biswas, Chaitali; Drew, Michael G. B.; Ruiz, Eliseo; Estrader, Marta; Diaz, Carmen; Ghosh, Ashutosh; Dalton transactions (Cambridge, England : 2003) 39 (2010) 7474–7484; doi:10.1039/c0dt00331j

data_7026298
_publ_section_title
;
 Synthesis, crystal structure and magnetic properties of three
 unprecedented tri-nuclear and one very rare tetra-nuclear copper(II)
 Schiff-base complexes supported by mixed azido/phenoxo/nitrato or acetato
 bridges.
;
_journal_issue                   32
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7474
_journal_page_last               7484
_journal_paper_doi               10.1039/c0dt00331j
_journal_volume                  39
_journal_year                    2010
_chemical_formula_sum            'C13 H18 Cu2 N8 O3'
_chemical_formula_weight         461.43
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 101.833(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.0042(5)
_cell_length_b                   9.5167(5)
_cell_length_c                   18.6682(12)
_cell_measurement_reflns_used    8320
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      30.00
_cell_measurement_theta_min      2.55
_cell_volume                     1739.57(17)
_computing_cell_refinement       'Crysalis, Oxford Diffraction'
_computing_data_collection       'Crysalis, Oxford Diffraction'
_computing_data_reduction        'Crysalis, Oxford Diffraction'
_computing_molecular_graphics    PLATON(Spek,2004)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.965
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device       'Oxford Diffaction X-Calibur System'
_diffrn_measurement_method       '321 frames, counting time 10 s.'
_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  0.0326
_diffrn_reflns_av_sigmaI/netI    0.0834
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            8320
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         30.00
_diffrn_reflns_theta_min         2.55
_diffrn_standards_decay_%        n/a
_diffrn_standards_interval_count n/a
_diffrn_standards_interval_time  n/a
_diffrn_standards_number         n/a
_exptl_absorpt_coefficient_mu    2.478
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.849
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'ABSPACK, Oxford Diffraction Ltd'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.762
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             936
_exptl_crystal_size_max          0.19
_exptl_crystal_size_mid          0.03
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.452
_refine_diff_density_min         -0.457
_refine_diff_density_rms         0.090
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.767
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     238
_refine_ls_number_reflns         4898
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.767
_refine_ls_R_factor_all          0.0687
_refine_ls_R_factor_gt           0.0347
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;

_refine_ls_weighting_details

w=1/[\s^2^(Fo^2^)+(0.0381P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3

;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0663
_refine_ls_wR_factor_ref         0.0721
_reflns_number_gt                3172
_reflns_number_total             4898
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00331j.txt
_cod_data_source_block           4
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7026298