Significant Enhancement of Energy Barriers in Dinuclear Dysprosium Single-Molecule Magnets Through Electron-Withdrawing Effects
Fatemah Habib; Gabriel Brunet; Veacheslav Vieru; Ilia Korobkov; Liviu F. Chibotaru; Muralee Murugesu; Journal of the American Chemical Society 135 (2013) 13242–13245; doi:10.1021/ja404846s

data_4120760
_publ_section_title
;
 Significant Enhancement of Energy Barriers in Dinuclear Dysprosium
 Single-Molecule Magnets Through Electron-Withdrawing Effects
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              13242
_journal_page_last               13245
_journal_paper_doi               10.1021/ja404846s
_journal_volume                  135
_journal_year                    2013
_chemical_formula_sum            'C44 H50 Dy2 N6 O12'
_chemical_formula_weight         1179.90
_chemical_name_systematic
; 
 ? 
;
_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
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                102.875(4)
_cell_angle_beta                 114.786(3)
_cell_angle_gamma                104.723(4)
_cell_formula_units_Z            1
_cell_length_a                   10.9716(10)
_cell_length_b                   11.0386(9)
_cell_length_c                   11.3570(10)
_cell_measurement_reflns_used    9845
_cell_measurement_temperature    200(2)
_cell_measurement_theta_max      36.36
_cell_measurement_theta_min      2.36
_cell_volume                     1119.56(18)
_computing_cell_refinement       'APEX II, Bruker (2009)'
_computing_data_collection       'APEX II, Bruker (2009)'
_computing_data_reduction        'XPREP, Bruker (2009)'
_computing_molecular_graphics    'SHELXTL, Bruker (2004)'
_computing_publication_material  'SHELXTL, Bruker (2004)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      200(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \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  0.0165
_diffrn_reflns_av_sigmaI/netI    0.0135
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            42508
_diffrn_reflns_theta_full        36.36
_diffrn_reflns_theta_max         36.36
_diffrn_reflns_theta_min         2.22
_exptl_absorpt_coefficient_mu    3.380
_exptl_absorpt_correction_T_max  0.6872
_exptl_absorpt_correction_T_min  0.6311
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Bruker (2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.750
_exptl_crystal_density_meas      ?
_exptl_crystal_description       block
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.12
_refine_diff_density_max         1.349
_refine_diff_density_min         -1.042
_refine_diff_density_rms         0.072
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     289
_refine_ls_number_reflns         10775
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0174
_refine_ls_R_factor_gt           0.0149
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0236P)^2^+0.3226P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0402
_refine_ls_wR_factor_ref         0.0420
_reflns_number_gt                10106
_reflns_number_total             10775
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja404846s_Ac.cif
_cod_data_source_block           mm112
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'n/a' was changed to '?' - the
value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        1119.56(17)
_cod_database_code               4120760