Dinuclear, tetranuclear and one-dimensional pyrazine-based copper(II) complexes: preparation, X-ray structure and magnetic properties.
Yuste, Consuelo; Cañadillas-Delgado, Laura; Ruiz-Pérez, Catalina; Lloret, Francesc; Julve, Miguel; Dalton transactions (Cambridge, England : 2003) 39 (2010) 167–179; doi:10.1039/b913274k

data_7024242
_publ_section_title
;
 Dinuclear, tetranuclear and one-dimensional pyrazine-based copper(II)
 complexes: preparation, X-ray structure and magnetic properties.
;
_journal_issue                   1
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              167
_journal_page_last               179
_journal_paper_doi               10.1039/b913274k
_journal_volume                  39
_journal_year                    2010
_chemical_formula_sum            'C24 H22 Cr Cu N6 O7'
_chemical_formula_weight         622.02
_chemical_name_systematic
;
?
;
_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                 91.576(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.5171(7)
_cell_length_b                   27.088(2)
_cell_length_c                   7.8068(7)
_cell_measurement_reflns_used    105
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      20.25
_cell_measurement_theta_min      7.67
_cell_volume                     2434.6(3)
_computing_cell_refinement
'Dirax/lsq (Duisenberg & Schreurs, 1989-2000)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction        'EvalCCD (Duisenberg & Schreurs 1990-2000)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device       '95mm CCD camera on \k-goniostat'
_diffrn_measurement_device_type  KappaCCD
_diffrn_measurement_method       'CCD rotation images, thick slices'
_diffrn_radiation_monochromator  'horizonally mounted graphite crystal'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0518
_diffrn_reflns_av_sigmaI/netI    0.0596
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       38
_diffrn_reflns_limit_k_min       -38
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            25322
_diffrn_reflns_theta_full        30.20
_diffrn_reflns_theta_max         30.20
_diffrn_reflns_theta_min         3.53
_diffrn_source                   'Enraf Nonius FR590'
_exptl_absorpt_coefficient_mu    1.379
_exptl_absorpt_correction_T_max  0.8977
_exptl_absorpt_correction_T_min  0.8095
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            green
_exptl_crystal_density_diffrn    1.697
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1268
_exptl_crystal_size_max          0.16
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.574
_refine_diff_density_min         -0.543
_refine_diff_density_rms         0.101
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     376
_refine_ls_number_reflns         7206
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0713
_refine_ls_R_factor_gt           0.0453
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0242P)^2^+3.5399P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0846
_refine_ls_wR_factor_ref         0.0929
_reflns_number_gt                5465
_reflns_number_total             7206
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b913274k.txt
_cod_data_source_block           compound2
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7024242