Hysteretic Spin Crossover between a Bisdithiazolyl Radical and Its Hypervalent σ-Dimer
Kristina Lekin; Stephen M. Winter; Laura E. Downie; Xuezhao Bao; John S. Tse; Serge Desgreniers; Richard A. Secco; Paul A. Dube; Richard T. Oakley; Journal of the American Chemical Society 132 (2010) 16212–16224; doi:10.1021/ja106768z

data_4103516
_publ_section_title
;
 Hysteretic Spin Crossover between a Bisdithiazolyl Radical and Its
 Hypervalent \s-Dimer
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              16212
_journal_page_last               16224
_journal_paper_doi               10.1021/ja106768z
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'C7 H5 F N3 S4'
_chemical_formula_weight         278.38
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           113
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P -4 2ab'
_symmetry_space_group_name_H-M   'P -4 21 m'
_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            4
_cell_length_a                   15.8542(7)
_cell_length_b                   15.8542(7)
_cell_length_c                   4.1273(3)
_cell_measurement_reflns_used    2225
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      26.35
_cell_measurement_theta_min      2.87
_cell_volume                     1037.42(10)
_computing_cell_refinement       ApexII
_computing_data_collection       ApexII
_computing_data_reduction        ApexII
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       '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  0.0257
_diffrn_reflns_av_sigmaI/netI    0.0205
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       4
_diffrn_reflns_limit_l_min       -5
_diffrn_reflns_number            5066
_diffrn_reflns_theta_full        26.35
_diffrn_reflns_theta_max         26.35
_diffrn_reflns_theta_min         2.87
_exptl_absorpt_coefficient_mu    0.895
_exptl_absorpt_correction_T_max  0.974
_exptl_absorpt_correction_T_min  0.778
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.782
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             564
_exptl_crystal_size_max          0.495
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.240
_refine_diff_density_min         -0.172
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.05(16)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.158
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     76
_refine_ls_number_reflns         1095
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.158
_refine_ls_R_factor_all          0.0330
_refine_ls_R_factor_gt           0.0309
_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^)+(0.0313P)^2^+0.4428P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0714
_refine_ls_wR_factor_ref         0.0730
_reflns_number_gt                1051
_reflns_number_total             1095
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja106768z_si_002.cif
_cod_data_source_block           fbpet_0m
_cod_database_code               4103516