Isostructural Salts of the Same Complex Showing Contrasting Thermal Spin-Crossover Mediated by Multiple Phase Changes
Thomas D. Roberts; Marc A. Little; Floriana Tuna; Colin A. Kilner; Malcolm A. Halcrow; Chem.Commun. 49 (2013) 6280–; doi:10.1039/c3cc43613f

data_7109472
_publ_section_title
;
 Isostructural Salts of the Same Complex Showing Contrasting Thermal
 Spin-Crossover Mediated by Multiple Phase Changes
;
_journal_name_full               Chem.Commun.
_journal_page_first              6280
_journal_paper_doi               10.1039/c3cc43613f
_journal_volume                  49
_journal_year                    2013
_chemical_formula_moiety         'C26 H26 Fe N10, 2[Cl O4]'
_chemical_formula_sum            'C26 H26 Cl2 Fe N10 O8'
_chemical_formula_weight         733.32
_chemical_name_systematic
; 
Bis[2,6-bis(5-methylpyrazol-3-yl)pyridine]iron(II) 
diperchlorate
;
_space_group_IT_number           86
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-P 4bc'
_symmetry_space_group_name_H-M   'P 42/n :2'
_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            2
_cell_length_a                   9.7396(3)
_cell_length_b                   9.7396(3)
_cell_length_c                   18.0080(8)
_cell_measurement_reflns_used    28726
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.38
_cell_measurement_theta_min      2.26
_cell_volume                     1708.24(11)
_computing_cell_refinement       'APEX 2 software, Bruker Nonius 2004'
_computing_data_collection       'APEX 2 software, Bruker Nonius 2004'
_computing_data_reduction        'SAINT, Bruker Nonius 2004'
_computing_molecular_graphics    'XSEED (Barbour, 2001)'
_computing_publication_material  'local program'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector_area_resol_mean '120 microns'
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker X8 Apex diffractometer'
_diffrn_measurement_method       'Rotation images'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0521
_diffrn_reflns_av_sigmaI/netI    0.0229
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            28726
_diffrn_reflns_theta_full        28.38
_diffrn_reflns_theta_max         28.38
_diffrn_reflns_theta_min         2.26
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.658
_exptl_absorpt_correction_T_max  0.995
_exptl_absorpt_correction_T_min  0.570
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
Sheldrick, G. M. (2002). SADABS v. 2.03. University of 
G/ottingen, Germany.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.426
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.829
_refine_diff_density_min         -0.585
_refine_diff_density_rms         0.113
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.532
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     142
_refine_ls_number_reflns         2138
_refine_ls_number_restraints     12
_refine_ls_restrained_S_all      1.589
_refine_ls_R_factor_all          0.1112
_refine_ls_R_factor_gt           0.0939
_refine_ls_shift/su_max          0.009
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.2000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.3195
_refine_ls_wR_factor_ref         0.3483
_reflns_number_gt                1642
_reflns_number_total             2138
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc43613f_2-1.cif
_cod_data_source_block           tr11
_cod_original_sg_symbol_H-M      'P 42/n'
_cod_database_code               7109472