An iron(ii) complex exhibiting five anhydrous phases, two of which interconvert by spin-crossover with wide hysteresis
Roberts, Thomas D.; Tuna, Floriana; Malkin, Tamsin L.; Kilner, Colin A.; Halcrow, Malcolm A.; Chemical Science 3 (2012) 349–; doi:10.1039/c1sc00584g

data_1514962
_publ_section_title
;
 An iron(ii) complex exhibiting five anhydrous phases, two of which
 interconvert by spin-crossover with wide hysteresis
;
_journal_issue                   2
_journal_name_full               'Chemical Science'
_journal_page_first              349
_journal_paper_doi               10.1039/c1sc00584g
_journal_volume                  3
_journal_year                    2012
_chemical_formula_moiety         'C26 H26 Fe N10, 2[B F4]'
_chemical_formula_sum            'C26 H26 B2 F8 Fe N10'
_chemical_formula_weight         708.04
_chemical_name_systematic
;
Bis[2,6-bis(5-methylpyrazol-3-yl)pyridine]iron(II)
ditetrafluoroborate
;
_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                   9.8046(5)
_cell_length_b                   9.8046(5)
_cell_length_c                   17.8869(13)
_cell_measurement_reflns_used    29025
_cell_measurement_temperature    300(2)
_cell_measurement_theta_max      28.41
_cell_measurement_theta_min      2.28
_cell_volume                     1719.47(18)
_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      300(2)
_diffrn_detector_area_resol_mean '120 microns'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0697
_diffrn_reflns_av_sigmaI/netI    0.0300
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            29025
_diffrn_reflns_theta_full        28.41
_diffrn_reflns_theta_max         28.41
_diffrn_reflns_theta_min         2.28
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.515
_exptl_absorpt_correction_T_max  0.801
_exptl_absorpt_correction_T_min  0.648
_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            orange
_exptl_crystal_density_diffrn    1.368
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.846
_refine_diff_density_min         -0.309
_refine_diff_density_rms         0.098
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   2.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         2165
_refine_ls_number_restraints     30
_refine_ls_restrained_S_all      2.110
_refine_ls_R_factor_all          0.0952
_refine_ls_R_factor_gt           0.0797
_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^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2612
_refine_ls_wR_factor_ref         0.2717
_reflns_number_gt                1612
_reflns_number_total             2165
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1sc00584g.txt
_cod_data_source_block           tr10rt
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      'P 4(2)/n'
_cod_database_code               1514962