Enforcing Multifunctionality: A Pressure-Induced Spin-Crossover Photomagnet.
Pinkowicz, Dawid; Rams, Michał; Mišek, Martin; Kamenev, Konstantin V.; Tomkowiak, Hanna; Katrusiak, Andrzej; Sieklucka, Barbara; Journal of the American Chemical Society 137 (2015) 8795–8802; doi:10.1021/jacs.5b04303

data_4124227
_publ_section_title
;
 Enforcing Multifunctionality: A Pressure-Induced Spin-Crossover
 Photomagnet.
;
_journal_issue                   27
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8795
_journal_page_last               8802
_journal_paper_doi               10.1021/jacs.5b04303
_journal_volume                  137
_journal_year                    2015
_chemical_formula_moiety         'C32 H32 Fe2 N24 Nb, 4(H2 O)'
_chemical_formula_sum            'C32 H40 Fe2 N24 Nb O4'
_chemical_formula_weight         1029.49
_chemical_name_systematic
; 
 ? 
;
_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            4
_cell_length_a                   20.60(2)
_cell_length_b                   20.60(2)
_cell_length_c                   9.16(2)
_cell_measurement_pressure       2120000
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      28.39
_cell_measurement_theta_min      3.71
_cell_volume                     3887(10)
_computing_cell_refinement       'CrysAlis (Oxford Diffraction, 2002)'
_computing_data_collection       'CrysAlis (Oxford Diffraction, 2002)'
_computing_data_reduction        'CrysAlis (Oxford Diffraction, 2002)'
_computing_molecular_graphics
;
Mercury
;
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.358
_diffrn_measured_fraction_theta_max 0.358
_diffrn_measurement_device_type  'Kuma KM4CCD \k geometry'
_diffrn_measurement_method
;
HP omega scans - for more details see:
A. Budzianowski, A. Katrusiak in High-Pressure Crystallography
(Eds.: A. Katrusiak, P. F. McMillan),
Dordrecht: Kluwer Acad. Publ., 2004 pp.157-168
;
_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  0.2048
_diffrn_reflns_av_sigmaI/netI    0.1232
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       25
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       4
_diffrn_reflns_limit_l_min       -4
_diffrn_reflns_number            8128
_diffrn_reflns_theta_full        28.39
_diffrn_reflns_theta_max         28.39
_diffrn_reflns_theta_min         3.71
_exptl_absorpt_coefficient_mu    1.100
_exptl_absorpt_correction_T_max  0.786
_exptl_absorpt_correction_T_min  0.726
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;   
Xcalibur CCD System, CrysAlisPro Software System, version 171.37.31;
 Oxford Diffraction Poland, 2014 
;
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.758
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2100
_exptl_crystal_size_max          0.41
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.22
_refine_diff_density_max         0.283
_refine_diff_density_min         -0.346
_refine_diff_density_rms         0.073
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.128
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     151
_refine_ls_number_reflns         874
_refine_ls_number_restraints     105
_refine_ls_restrained_S_all      1.085
_refine_ls_R_factor_all          0.1970
_refine_ls_R_factor_gt           0.0766
_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^)+(0.0800P)^2^+1.4000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1662
_refine_ls_wR_factor_ref         0.2199
_reflns_number_gt                337
_reflns_number_total             874
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja5b04303_si_004.cif
_cod_data_source_block           2.12_GPa
_cod_original_cell_volume        3890(11)
_cod_original_sg_symbol_H-M      I41/a
_cod_database_code               4124227