The coordination preferences of metal centres modulate superexchange coupling interactions in a metallo-supramolecular helical assembly.
Pedrido, Rosa; Vázquez López, Miguel; Sorace, Lorenzo; González-Noya, Ana M; Cwiklinska, Magdalena; Suárez-Gómez, Vanesa; Zaragoza, Guillermo; Bermejo, Manuel R.; Chemical communications (Cambridge, England) 46 (2010) 4797–4799; doi:10.1039/c0cc00338g

data_7112843
_publ_section_title
;
 The coordination preferences of metal centres modulate superexchange
 coupling interactions in a metallo-supramolecular helical assembly.
;
_journal_issue                   26
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              4797
_journal_page_last               4799
_journal_paper_doi               10.1039/c0cc00338g
_journal_volume                  46
_journal_year                    2010
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C54 H54 N10 Ni2 O12'
_chemical_formula_sum            'C54 H54 N10 Ni2 O12'
_chemical_formula_weight         1152.49
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_Int_Tables_number      2
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.3
_audit_creation_date             2010-01-25T14:46:28-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                106.501(4)
_cell_angle_beta                 115.704(3)
_cell_angle_gamma                101.319(4)
_cell_formula_units_Z            2
_cell_length_a                   14.798(3)
_cell_length_b                   14.821(3)
_cell_length_c                   15.663(3)
_cell_measurement_reflns_used    1330
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      26
_cell_measurement_theta_min      2.64
_cell_measurement_wavelength     0.71073
_cell_volume                     2757.5(10)
_computing_cell_refinement       'BRUKER SMART'
_computing_data_collection       'BRUKER SMART'
_computing_data_reduction        'BRUKER SAINT'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR-97 (C.Giacovazzo et all , 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Smart-CCD-1000 BRUKER'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.0558
_diffrn_reflns_av_unetI/netI     0.0665
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            31621
_diffrn_reflns_theta_full        26.41
_diffrn_reflns_theta_max         26.41
_diffrn_reflns_theta_min         1.54
_exptl_absorpt_coefficient_mu    0.753
_exptl_absorpt_correction_T_max  0.9019
_exptl_absorpt_correction_T_min  0.8226
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'BRUKER SADABS'
_exptl_crystal_colour            Brown
_exptl_crystal_density_diffrn    1.388
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1200
_exptl_crystal_size_max          0.27
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.14
_platon_squeeze_details          ' ?'
_refine_diff_density_max         0.719
_refine_diff_density_min         -0.409
_refine_diff_density_rms         0.078
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     711
_refine_ls_number_reflns         11272
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0667
_refine_ls_R_factor_gt           0.0428
_refine_ls_shift/su_max          0.009
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0478P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.097
_refine_ls_wR_factor_ref         0.1041
_reflns_number_gt                7896
_reflns_number_total             11272
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c0cc00338g.txt
_cod_data_source_block           be63rp1n
_cod_original_cell_volume        2757.4(10)
_cod_database_code               7112843