Spin Switching via Targeted Structural Distortion
Constantinos J. Milios; Alina Vinslava; Wolfgang Wernsdorfer; Alessandro Prescimone; Peter A. Wood; Simon Parsons; Spyros P. Perlepes; George Christou; Euan K. Brechin; Journal of the American Chemical Society 129 (2007) 6547–6561; doi:10.1021/ja070411g

data_4109426
_publ_contact_author_name        'Alessandro Prescimone'
_publ_section_title
;
 Spin Switching via Targeted Structural Distortion
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6547
_journal_page_last               6561
_journal_paper_doi               10.1021/ja070411g
_journal_volume                  129
_journal_year                    2007
_chemical_compound_source        'C. Milios CM2439'
_chemical_formula_moiety         '[Mn6(EtSaO)6(EtOH)5(Piv)2]'
_chemical_formula_sum            'C74 H102 Mn6 N6 O23'
_chemical_formula_weight         1773.22
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_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
_audit_creation_date             06-09-07
_audit_creation_method           CRYSTALS_ver_12.84
_cell_angle_alpha                82.87(3)
_cell_angle_beta                 85.73(3)
_cell_angle_gamma                76.51(3)
_cell_formula_units_Z            2
_cell_length_a                   13.486(3)
_cell_length_b                   14.882(3)
_cell_length_c                   20.822(4)
_cell_measurement_reflns_used    7744
_cell_measurement_temperature    150
_cell_measurement_theta_max      30
_cell_measurement_theta_min      2
_cell_volume                     4027.7(15)
_computing_cell_refinement       'SAINT (Siemens ,1995)'
_computing_data_collection       'SMART (Siemens, 1993)'
_computing_data_reduction        'SAINT (Siemens ,1995)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.892
_diffrn_measurement_device_type  'Bruker SMART'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.056
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            47310
_diffrn_reflns_theta_full        25.187
_diffrn_reflns_theta_max         28.950
_diffrn_reflns_theta_min         1.416
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.988
_exptl_absorpt_correction_T_max  0.91
_exptl_absorpt_correction_T_min  0.28
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Siemens, 1996)'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.462
_exptl_crystal_description       block
_exptl_crystal_F_000             1844
_exptl_crystal_recrystallization_method
;
Recrystallisation by slow evaporation of an ethanol solution
;
_exptl_crystal_size_max          0.64
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.90
_refine_diff_density_min         -0.74
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.1073
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     982
_refine_ls_number_reflns         10875
_refine_ls_number_restraints     1
_refine_ls_R_factor_all          0.0969
_refine_ls_R_factor_gt           0.0512
_refine_ls_shift/su_max          0.001054
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982) 
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)] 
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax 
 Method = Robust Weighting (Prince, 1982) 
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^ 
 A~i~ are: 
 0.252 -2.72 -0.211 -1.16 
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0352
_refine_ls_wR_factor_gt          0.0282
_refine_ls_wR_factor_ref         0.0282
_reflns_limit_h_max              18
_reflns_limit_h_min              -18
_reflns_limit_k_max              19
_reflns_limit_k_min              -18
_reflns_limit_l_max              28
_reflns_limit_l_min              0
_reflns_number_gt                10875
_reflns_number_total             19012
_reflns_threshold_expression     I>2.0\s(I)
_oxford_diffrn_Wilson_B_factor   0.00
_oxford_diffrn_Wilson_scale      0.00
_oxford_refine_ls_scale          0.22055(18)
_oxford_structure_analysis_title 'eb6121 in P-1'
_cod_data_source_file            ja070411gsi20070119_061846.cif
_cod_data_source_block           eb6121
_cod_original_cell_volume        4027.6(15)
_cod_original_sg_symbol_H-M      'P -1 '
_cod_database_code               4109426