High-Field EPR Reveals the Strongly Temperature-Dependent Exchange Interaction in "Breathing" Crystals Cu(hfac)2LR
Sergey L. Veber; Matvey V. Fedin; Alexey I. Potapov; Ksenia Yu. Maryunina; Galina V. Romanenko; Renad Z. Sagdeev; Victor I. Ovcharenko; Daniella Goldfarb; Elena G. Bagryanskaya; Journal of the American Chemical Society 130 (2008) 2444–2445; doi:10.1021/ja710773u

data_4107469
_publ_section_title
;
 High-Field EPR Reveals the Strongly Temperature-Dependent Exchange
 Interaction in "Breathing" Crystals Cu(hfac)2LR
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              2444
_journal_page_last               2445
_journal_paper_doi               10.1021/ja710773u
_journal_volume                  130
_journal_year                    2008
_chemical_formula_sum            'C28 H34 Cu F12 N4 O6'
_chemical_formula_weight         814.13
_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                99.156(2)
_cell_angle_beta                 95.855(2)
_cell_angle_gamma                113.210(2)
_cell_formula_units_Z            2
_cell_length_a                   10.9007(17)
_cell_length_b                   13.296(2)
_cell_length_c                   13.410(2)
_cell_measurement_reflns_used    6648
_cell_measurement_temperature    145(2)
_cell_measurement_theta_max      23.29
_cell_measurement_theta_min      2.56
_cell_volume                     1734.2(5)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      145(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0326
_diffrn_reflns_av_sigmaI/netI    0.0409
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            13445
_diffrn_reflns_theta_full        23.29
_diffrn_reflns_theta_max         23.29
_diffrn_reflns_theta_min         2.05
_exptl_absorpt_coefficient_mu    0.740
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            dark
_exptl_crystal_density_diffrn    1.559
_exptl_crystal_description       prizm
_exptl_crystal_F_000             830
_refine_diff_density_max         0.717
_refine_diff_density_min         -0.396
_refine_diff_density_rms         0.064
_refine_ls_extinction_coef       0.0000(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     666
_refine_ls_number_reflns         4981
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0468
_refine_ls_R_factor_gt           0.0423
_refine_ls_shift/su_max          4.932
_refine_ls_shift/su_mean         0.029
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1166P)^2^+0.0906P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1376
_refine_ls_wR_factor_ref         0.1449
_reflns_number_gt                4446
_reflns_number_total             4981
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja710773u-file001_2.cif
_cod_data_source_block           594cs
_cod_original_cell_volume        1734.4(5)
_cod_database_code               4107469