High-spin tetranuclear MnII2MnIV2 clusters with unique Mn(ii)–Mn(iv) magnetic exchange: synthesis, structures and magnetism
Zhou, Ai-Ju; Liu, Jun-Liang; Herchel, Radovan; Leng, Ji-Dong; Tong, Ming-Liang; Dalton Transactions  (2009) 3182–3192; doi:10.1039/b823042k

data_7001082
_publ_section_title
;
 High-spin tetranuclear MnII2MnIV2 clusters with unique Mn(ii)--Mn(iv)
 magnetic exchange: synthesis, structures and magnetism
;
_journal_issue                   17
_journal_name_full               'Dalton Transactions'
_journal_page_first              3182
_journal_page_last               3192
_journal_paper_doi               10.1039/b823042k
_journal_year                    2009
_chemical_formula_sum            'C32 H68 Mn4 N4 O16'
_chemical_formula_weight         984.66
_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                 94.795(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.6698(12)
_cell_length_b                   12.0458(12)
_cell_length_c                   13.7154(13)
_cell_measurement_reflns_used    2221
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      24.419
_cell_measurement_theta_min      2.335
_cell_volume                     2085.9(3)
_computing_cell_refinement       'SAINT-PLUS, Ver. 6.0, 1997'
_computing_data_collection       'SMART, 1998.'
_computing_data_reduction        'SAINT-PLUS, Ver. 6.0, 1997'
_computing_molecular_graphics    'XP, Ver. 6.10, Bruker AXS Inc., 2000'
_computing_publication_material  'SHELXTL-Bruker AXS Inc., 1998'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.932
_diffrn_measured_fraction_theta_max 0.932
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0305
_diffrn_reflns_av_sigmaI/netI    0.0447
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            8361
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.34
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.255
_exptl_absorpt_correction_T_max  0.8518
_exptl_absorpt_correction_T_min  0.7892
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2002)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.568
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1032
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.342
_refine_diff_density_min         -0.280
_refine_diff_density_rms         0.066
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         3830
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0506
_refine_ls_R_factor_gt           0.0408
_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^)+(0.0431P)^2^+0.7401P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0917
_refine_ls_wR_factor_ref         0.0968
_reflns_number_gt                3245
_reflns_number_total             3830
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b823042k.txt
_cod_data_source_block           complex_2
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7001082