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_1514960
_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], 2[H2 O]'
_chemical_formula_sum            'C26 H30 B2 F8 Fe N10 O2'
_chemical_formula_weight         744.07
_chemical_name_systematic
;
Bis[2,6-bis(5-methylpyrazol-3-yl)pyridine]iron(II)
ditetrafluoroborate dihydrate
;
_space_group_IT_number           88
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-I 4ad'
_symmetry_space_group_name_H-M   'I 41/a :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            8
_cell_length_a                   13.7494(19)
_cell_length_b                   13.7494(19)
_cell_length_c                   35.336(3)
_cell_measurement_reflns_used    35446
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      28.86
_cell_measurement_theta_min      1.59
_cell_volume                     6680.1(14)
_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 0.993
_diffrn_measured_fraction_theta_max 0.993
_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  0.0855
_diffrn_reflns_av_sigmaI/netI    0.0497
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       47
_diffrn_reflns_limit_l_min       -48
_diffrn_reflns_number            35446
_diffrn_reflns_theta_full        28.86
_diffrn_reflns_theta_max         28.86
_diffrn_reflns_theta_min         1.59
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.538
_exptl_absorpt_correction_T_max  0.752
_exptl_absorpt_correction_T_min  0.586
_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            brown
_exptl_crystal_density_diffrn    1.480
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'rectangular prism'
_exptl_crystal_F_000             3040
_exptl_crystal_size_max          0.41
_exptl_crystal_size_mid          0.32
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.482
_refine_diff_density_min         -0.463
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.009
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     233
_refine_ls_number_reflns         4363
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.009
_refine_ls_R_factor_all          0.0771
_refine_ls_R_factor_gt           0.0428
_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^)+(0.0462P)^2^+7.7563P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1034
_refine_ls_wR_factor_ref         0.1211
_reflns_number_gt                2833
_reflns_number_total             4363
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1sc00584g.txt
_cod_data_source_block           tr10a
_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_cell_volume        6680.2(14)
_cod_original_sg_symbol_H-M      'I 41/a'
_cod_database_code               1514960