Large Spin Differences in Structurally Related Fe6 Molecular Clusters and Their Magnetostructural Explanation
Cristina Cañada-Vilalta; Ted A. O'Brien; Euan K. Brechin; Maren Pink; Ernest R. Davidson; George Christou; Inorganic Chemistry 43 (2004) 5505–5521; doi:10.1021/ic049413h

data_4311484
_publ_section_title
;
 Large Spin Differences in Structurally Related Fe6 Molecular Clusters and
 Their Magnetostructural Explanation
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_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5505
_journal_page_last               5521
_journal_paper_doi               10.1021/ic049413h
_journal_volume                  43
_journal_year                    2004
_chemical_formula_moiety         'C64 H108 Fe6 N2 O26'
_chemical_formula_sum            'C64 H108 Fe6 N2 O26'
_chemical_formula_weight         1656.62
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 94.898(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.8387(9)
_cell_length_b                   22.2748(16)
_cell_length_c                   14.8987(11)
_cell_measurement_reflns_used    4109
_cell_measurement_temperature    110(2)
_cell_measurement_theta_max      29.7
_cell_measurement_theta_min      2.3
_cell_volume                     3914.5(5)
_computing_cell_refinement       'SAINT (Bruker, current version)'
_computing_data_collection       'SMART (Bruker, current version)'
_computing_data_reduction        'SAINT (Bruker, current version)'
_computing_molecular_graphics    'SHELXTL (Bruker), XTEL (Local Library)'
_computing_publication_material  'SHELXTL (Bruker)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      110(2)
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 44.52
_diffrn_detector_type            'Bruker SMART 6000'
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_details
'0.30 degree frames measured for 3 seconds each'
_diffrn_measurement_device       'three-circle goniometer with fixed chi'
_diffrn_measurement_device_type  'Bruker Platform goniometer'
_diffrn_measurement_method       \w-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  0.1155
_diffrn_reflns_av_sigmaI/netI    0.1062
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            26283
_diffrn_reflns_theta_full        25.02
_diffrn_reflns_theta_max         25.02
_diffrn_reflns_theta_min         1.95
_exptl_absorpt_coefficient_mu    1.156
_exptl_absorpt_correction_T_max  0.8932
_exptl_absorpt_correction_T_min  0.8457
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing (1995)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.405
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1740
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.556
_refine_diff_density_min         -0.747
_refine_diff_density_rms         0.104
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     488
_refine_ls_number_reflns         6888
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.1133
_refine_ls_R_factor_gt           0.0534
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0461P)^2^+6.3508P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1132
_refine_ls_wR_factor_ref         0.1429
_reflns_number_gt                4101
_reflns_number_total             6888
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic049413hsi20040506_081740_1.cif
_cod_data_source_block           02026
_cod_depositor_comments
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The following automatic conversions were performed:

'_exptl_absorpt_correction_type' tag value 'multi-scans' was replaced
with 'multi-scan' value.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
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_cod_database_code               4311484