The number and shape of lattice solvent molecules controls spin-crossover in an isomorphous series of crystalline solvate salts.
Berdiell, Izar Capel; Kulmaczewski, Rafal; Shahid, Namrah; Cespedes, Oscar; Halcrow, Malcolm A.; Chemical communications (Cambridge, England) 57 (2021) 6566–6569; doi:10.1039/d1cc02624k

data_7128414
_publ_section_title
;
 The number and shape of lattice solvent molecules controls spin-crossover
 in an isomorphous series of crystalline solvate salts.
;
_journal_issue                   53
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              6566
_journal_page_last               6569
_journal_paper_doi               10.1039/d1cc02624k
_journal_volume                  57
_journal_year                    2021
_chemical_formula_moiety         'C26 H24 Fe N12 O2, 2(Cl O4), C2 H3 N'
_chemical_formula_sum            'C28 H27 Cl2 Fe N13 O10'
_chemical_formula_weight         832.37
_chemical_name_systematic
; 
Bis-[N-(2,6-di{pyrazol-1-yl}pyrid-4-yl)acetamide]iron(II)
diperchlorate acetonitrile solvate
;
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2020-07-20
_audit_creation_method
;
Olex2 1.3
(compiled 2020.06.28 svn.raecde09e for OlexSys, GUI svn.r6132)
;
_cell_angle_alpha                81.925(5)
_cell_angle_beta                 78.760(6)
_cell_angle_gamma                85.352(6)
_cell_formula_units_Z            2
_cell_length_a                   8.3202(8)
_cell_length_b                   12.3819(8)
_cell_length_c                   17.5192(9)
_cell_measurement_reflns_used    5377
_cell_measurement_temperature    160(2)
_cell_measurement_theta_max      73.53
_cell_measurement_theta_min      4.15
_cell_volume                     1750.0(2)
_computing_cell_refinement       'CrysAlisPro 1.171.38.43b (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.43b (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.43b (Rigaku OD, 2015)'
_computing_molecular_graphics    'XSEED (Barbour, 2001)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS (Sheldrick, 2015)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      160(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 5.3095
_diffrn_measured_fraction_theta_full 0.943
_diffrn_measured_fraction_theta_max 0.928
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0462
_diffrn_reflns_av_unetI/netI     0.0501
_diffrn_reflns_Laue_measured_fraction_full 0.943
_diffrn_reflns_Laue_measured_fraction_max 0.928
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            13173
_diffrn_reflns_point_group_measured_fraction_full 0.943
_diffrn_reflns_point_group_measured_fraction_max 0.928
_diffrn_reflns_theta_full        72.000
_diffrn_reflns_theta_max         73.867
_diffrn_reflns_theta_min         3.611
_diffrn_source                   'micro-focus sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    5.521
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.633
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.43b (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            brown
_exptl_crystal_density_diffrn    1.580
_exptl_crystal_description       plate
_exptl_crystal_F_000             852
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.968
_refine_diff_density_min         -0.813
_refine_diff_density_rms         0.119
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.096
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     484
_refine_ls_number_reflns         6578
_refine_ls_number_restraints     26
_refine_ls_restrained_S_all      1.098
_refine_ls_R_factor_all          0.0963
_refine_ls_R_factor_gt           0.0875
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1255P)^2^+5.8633P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2520
_refine_ls_wR_factor_ref         0.2599
_reflns_Friedel_coverage         0.000
_reflns_number_gt                5614
_reflns_number_total             6578
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1cc02624k19.cif
_cod_data_source_block           80clalt
_cod_depositor_comments
'Adding full bibliography for 7128414--7128431.cif.'
_cod_database_code               7128414
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained distances
 Cl2A-O43A = Cl2A-O44A = Cl2A-O45A = Cl2A-O46A
 1.44134 with sigma of 0.02
 Cl2B-O43B = Cl2B-O44B = Cl2B-O45B = Cl2B-O46B
 1.44134 with sigma of 0.02
 O43A-O44A = O43A-O45A = O43A-O46A = O44A-O45A = O44A-O46A = O45A-O46A
 2.353708 with sigma of 0.02
 O43B-O44B = O43B-O45B = O43B-O46B = O44B-O45B = O44B-O46B = O45B-O46B
 2.353708 with sigma of 0.02
 C52A-C53A = C52B-C53B
 1.48 with sigma of 0.02
 C53A-N54A = C53B-N54B
 1.15 with sigma of 0.02
 C52A-N54A = C52B-N54B
 2.63 with sigma of 0.02
3. Others
 1(DFIX)=1(DFIX)=FVAR(1)
 1(DFIX)=1(DFIX)=1.633*FVAR(2)
 Fixed Sof: Cl2A(0.5) O43A(0.5) O44A(0.5) O45A(0.5) O46A(0.5) Cl2B(0.5)
 O43B(0.5) O44B(0.5) O45B(0.5) O46B(0.5) C52A(0.5) H52A(0.5) H52B(0.5)
 H52C(0.5) C53A(0.5) N54A(0.5) C52B(0.5) H52D(0.5) H52E(0.5) H52F(0.5)
 C53B(0.5) N54B(0.5)
4.a Aromatic/amide H refined with riding coordinates:
 C4(H4), C6(H6), C10(H10), C11(H11), C12(H12), C15(H15), C16(H16), C17(H17),
 N18(H18), C24(H24), C26(H26), C30(H30), C31(H31), C32(H32), C35(H35), C36(H36),
  C37(H37), N38(H38)
4.b Idealised Me refined as rotating group:
 C21(H21A,H21B,H21C), C41(H41A,H41B,H41C), C52A(H52A,H52B,H52C), C52B(H52D,
 H52E,H52F)
;
_shelx_res_checksum              79925
_shelx_hkl_checksum              5053
_olex2_submission_special_instructions 'No special instructions were received'