Unexpected Spin-Crossover and a Low-Pressure Phase Change in an Iron(II)/Dipyrazolylpyridine Complex Exhibiting a High-Spin Jahn-Teller Distortion.
Kershaw Cook, Laurence J.; Thorp-Greenwood, Flora L; Comyn, Tim P.; Cespedes, Oscar; Chastanet, Guillaume; Halcrow, Malcolm A.; Inorganic chemistry 54 (2015) 6319–6330; doi:10.1021/acs.inorgchem.5b00614

data_4343277
_publ_section_title
;
 Unexpected Spin-Crossover and a Low-Pressure Phase Change in an
 Iron(II)/Dipyrazolylpyridine Complex Exhibiting a High-Spin Jahn-Teller
 Distortion.
;
_journal_issue                   13
_journal_name_full               'Inorganic chemistry'
_journal_page_first              6319
_journal_page_last               6330
_journal_paper_doi               10.1021/acs.inorgchem.5b00614
_journal_volume                  54
_journal_year                    2015
_chemical_formula_moiety         'C24 H22 Fe N10, 2[Cl O4]'
_chemical_formula_sum            'C24 H22 Cl2 Fe N10 O8'
_chemical_formula_weight         705.27
_chemical_name_systematic
; 
Bis-[4-methyl-2,6-di{pyrazol-1-yl}pyridine]iron(II) diperchlorate
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_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                 90.812(8)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.5607(8)
_cell_length_b                   8.6545(6)
_cell_length_c                   39.632(3)
_cell_measurement_reflns_used    1483
_cell_measurement_temperature    240(2)
_cell_measurement_theta_max      69.14
_cell_measurement_theta_min      4.44
_cell_volume                     2936.0(4)
_computing_cell_refinement       'CrysAlisPro, Agilent Technologies'
_computing_data_collection       'CrysAlisPro, Agilent Technologies'
_computing_data_reduction        'CrysAlisPro, Agilent Technologies'
_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      240(2)
_diffrn_detector_area_resol_mean 5.3095
_diffrn_measured_fraction_theta_full 0.909
_diffrn_measured_fraction_theta_max 0.909
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_source         'SuperNova (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0616
_diffrn_reflns_av_sigmaI/netI    0.0888
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       43
_diffrn_reflns_limit_l_min       -48
_diffrn_reflns_number            9230
_diffrn_reflns_theta_full        73.95
_diffrn_reflns_theta_max         73.95
_diffrn_reflns_theta_min         2.23
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    6.378
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.760
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
CrysAlisPro, Agilent Technologies,
Version 1.171.36.24 (release 03-12-2012 CrysAlis171 .NET)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.596
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1440
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.757
_refine_diff_density_min         -0.554
_refine_diff_density_rms         0.087
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.099
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     469
_refine_ls_number_reflns         5406
_refine_ls_number_restraints     60
_refine_ls_restrained_S_all      1.096
_refine_ls_R_factor_all          0.1425
_refine_ls_R_factor_gt           0.0981
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0537P)^2^+13.9885P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2220
_refine_ls_wR_factor_ref         0.2491
_reflns_number_gt                3430
_reflns_number_total             5406
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic5b00614_si_002.cif
_cod_data_source_block           lkc204mt
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/ACS/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 3271 2015-04-21 07:52:19Z andrius 

 Adding full bibliography for 4343275--4343279.cif.
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4343277