Pyridazine-bridged copper(I) complexes of bis-bidentate ligands: tetranuclear [2 x 2] grid versus dinuclear side-by-side architectures as a function of ligand substituents.
Price, Jason R.; Lan, Yanhua; Brooker, Sally; Dalton transactions (Cambridge, England : 2003)  (2007) 1807–1820; doi:10.1039/B700503B

data_7005306
_publ_section_title
;
 Pyridazine-bridged copper(I) complexes of bis-bidentate ligands:
 tetranuclear [2 x 2] grid versus dinuclear side-by-side architectures
 as a function of ligand substituents.
;
_journal_issue                   18
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1807
_journal_page_last               1820
_journal_paper_doi               10.1039/B700503B
_journal_year                    2007
_chemical_formula_sum            'C24 H26 N4'
_chemical_formula_weight         370.49
_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                 98.4910(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.5883(2)
_cell_length_b                   9.9822(2)
_cell_length_c                   24.5153(6)
_cell_measurement_temperature    83(2)
_cell_volume                     2078.66(8)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      83(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker SMART area detector'
_diffrn_measurement_method       'CCD area detector'
_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  0.1501
_diffrn_reflns_av_sigmaI/netI    0.1207
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            17964
_diffrn_reflns_theta_full        25.43
_diffrn_reflns_theta_max         25.43
_diffrn_reflns_theta_min         1.68
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.144
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker AXS Inc., 2000)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.184
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             792
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.240
_refine_diff_density_min         -0.246
_refine_diff_density_rms         0.059
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.989
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     259
_refine_ls_number_reflns         3802
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.989
_refine_ls_R_factor_all          0.1512
_refine_ls_R_factor_gt           0.0749
_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^)+(0.0812P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1550
_refine_ls_wR_factor_ref         0.1865
_reflns_number_gt                2057
_reflns_number_total             3802
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            B700503B.txt
_cod_data_source_block           g6
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7005306