Synthesis, characterization, mechanochromism and photochromism of [Fe(dm4bt)(3)][FeCl(4)](2) and [Fe(dm4bt)(3)][FeBr(4)](2), along with the investigation of steric influence on spin state.
Abedi, Anita; Safari, Nasser; Amani, Vahid; Khavasi, Hamid Reza; Dalton transactions (Cambridge, England : 2003) 40 (2011) 6877–6885; doi:10.1039/c0dt01508c

data_7015974
_publ_section_title
;
 Synthesis, characterization, mechanochromism and photochromism of
 [Fe(dm4bt)(3)][FeCl(4)](2) and [Fe(dm4bt)(3)][FeBr(4)](2), along with
 the investigation of steric influence on spin state.
;
_journal_issue                   26
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6877
_journal_page_last               6885
_journal_paper_doi               10.1039/c0dt01508c
_journal_volume                  40
_journal_year                    2011
_chemical_formula_sum            'C24 H24 Cl8 Fe3 N6 S6'
_chemical_formula_weight         1040.06
_chemical_name_systematic
;
?
;
_space_group_IT_number           167
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-R 3 2"c'
_symmetry_space_group_name_H-M   'R -3 c :H'
_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                120.00
_cell_formula_units_Z            6
_cell_length_a                   12.6728(19)
_cell_length_b                   12.6728(19)
_cell_length_c                   42.174(7)
_cell_measurement_reflns_used    2000
_cell_measurement_temperature    120(2)
_cell_volume                     5865.7(16)
_computing_cell_refinement       'X-Area 1.31 (Stoe & Cie GmbH, 2005)'
_computing_data_collection       'X-Area 1.31 (Stoe & Cie GmbH, 2005)'
_computing_data_reduction        'X-Area 1.31 (Stoe & Cie GmbH, 2005)'
_computing_molecular_graphics    'X-Step32 1.07e (Stoe & Cie GmbH, 2000)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean '0.15 mm'
_diffrn_measured_fraction_theta_full 0.967
_diffrn_measured_fraction_theta_max 0.967
_diffrn_measurement_device_type  'STOE IPDS II'
_diffrn_measurement_method       'rotation method'
_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  0.0218
_diffrn_reflns_av_sigmaI/netI    0.0132
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       47
_diffrn_reflns_limit_l_min       -55
_diffrn_reflns_number            5060
_diffrn_reflns_theta_full        27.86
_diffrn_reflns_theta_max         27.86
_diffrn_reflns_theta_min         2.09
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.994
_exptl_absorpt_correction_T_max  0.372
_exptl_absorpt_correction_T_min  0.350
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'shape of crystal determined optically'
_exptl_crystal_colour            Red
_exptl_crystal_density_diffrn    1.767
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3120
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.45
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.546
_refine_diff_density_min         -0.667
_refine_diff_density_rms         0.072
_refine_ls_extinction_coef       0.0010(3)
_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   1.124
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     73
_refine_ls_number_reflns         1515
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.124
_refine_ls_R_factor_all          0.0351
_refine_ls_R_factor_gt           0.0341
_refine_ls_shift/su_max          0.009
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0319P)^2^+29.7417P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0848
_refine_ls_wR_factor_ref         0.0856
_reflns_number_gt                1473
_reflns_number_total             1515
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt01508c.txt
_cod_data_source_block           kh161-abs1
_cod_original_sg_symbol_H-M      R-3c
_cod_database_code               7015974