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_7026296
_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            'C24 H34 Cu3 N12 O8'
_chemical_formula_weight         809.26
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 112.53(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.538(3)
_cell_length_b                   18.379(5)
_cell_length_c                   8.705(3)
_cell_measurement_reflns_used    9641
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      30.00
_cell_measurement_theta_min      2.22
_cell_volume                     1557.3(9)
_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 0.978
_diffrn_measured_fraction_theta_max 0.978
_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  0.0834
_diffrn_reflns_av_sigmaI/netI    0.1300
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            9641
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         30.00
_diffrn_reflns_theta_min         2.22
_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    2.097
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.799
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'ABSPACK, Oxford Diffraction Ltd'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.726
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             826
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.776
_refine_diff_density_min         -0.787
_refine_diff_density_rms         0.108
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.932
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         4442
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.932
_refine_ls_R_factor_all          0.1557
_refine_ls_R_factor_gt           0.0728
_refine_ls_shift/su_max          0.001
_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^)+(0.0705P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3

;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1313
_refine_ls_wR_factor_ref         0.1566
_reflns_number_gt                2309
_reflns_number_total             4442
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00331j.txt
_cod_data_source_block           2
_cod_original_cell_volume        1557.4(8)
_cod_original_sg_symbol_H-M      P21/c
_cod_original_formula_sum        'C24 H34 Cu3 N12 O8 '
_cod_database_code               7026296