A New Family of 1D Exchange Biased Heterometal Single-Molecule Magnets: Observation of Pronounced Quantum Tunneling Steps in the Hysteresis Loops of Quasi-Linear {Mn2Ni3} Clusters
Animesh Das; Klaus Gieb; Yulia Krupskaya; Serhiy Demeshko; Sebastian Dechert; Rüdiger Klingeler; Vladislav Kataev; Bernd Büchner; Paul Müller; Franc Meyer; Journal of the American Chemical Society 133 (2011) 3433–3443; doi:10.1021/ja108740c

data_4105724
_publ_contact_author_address
; Institut f\"ur Anorganische Chemie
  Georg August Universit\"at G\"ottingen
  Tammannstra\&se 4
  D-37077 G\"ottingen
  Germany
;
_publ_contact_author_email       franc.meyer@chemie.uni-goettingen.de
_publ_contact_author_fax         49(551)393063
_publ_contact_author_name        'Prof. Dr. Franc Meyer'
_publ_contact_author_phone       49(551)393012
_publ_section_title
;
 A New Family of 1D Exchange Biased Heterometal Single-Molecule Magnets:
 Observation of Pronounced Quantum Tunneling Steps in the Hysteresis Loops
 of Quasi-Linear {Mn2Ni3} Clusters
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              3433
_journal_page_last               3443
_journal_paper_doi               10.1021/ja108740c
_journal_volume                  133
_journal_year                    2011
_chemical_formula_moiety         'C11 H12 N2 O2'
_chemical_formula_sum            'C11 H12 N2 O2'
_chemical_formula_weight         204.23
_space_group_IT_number           82
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I -4'
_symmetry_space_group_name_H-M   'I -4'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   18.723(3)
_cell_length_b                   18.723(3)
_cell_length_c                   5.7808(12)
_cell_measurement_reflns_used    6161
_cell_measurement_temperature    133(2)
_cell_measurement_theta_max      26.89
_cell_measurement_theta_min      1.54
_cell_volume                     2026.5(6)
_computing_cell_refinement       'X-AREA (Stoe & Cie, 2002)'
_computing_data_collection       'X-AREA (Stoe & Cie, 2002)'
_computing_data_reduction        'X-AREA (Stoe & Cie, 2002)'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 2001)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      133(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Stoe IPDS II'
_diffrn_measurement_method       \w
_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  0.1048
_diffrn_reflns_av_sigmaI/netI    0.0496
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            6161
_diffrn_reflns_theta_full        26.89
_diffrn_reflns_theta_max         26.89
_diffrn_reflns_theta_min         1.54
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9568
_exptl_absorpt_correction_T_min  0.7731
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'X-RED (Stoe & Cie, 2002)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.339
_exptl_crystal_description       needle
_exptl_crystal_F_000             864
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.160
_refine_diff_density_min         -0.169
_refine_diff_density_rms         0.041
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   10(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     144
_refine_ls_number_reflns         1207
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0383
_refine_ls_R_factor_gt           0.0365
_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^)+(0.0468P)^2^+0.5476P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0905
_refine_ls_wR_factor_ref         0.0916
_reflns_number_gt                1146
_reflns_number_total             1207
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja108740c_si_002_2.cif
_cod_data_source_block           ak20-H2L
_cod_original_cell_volume        2026.6(6)
_cod_database_code               4105724