Chalcogen bond activation in cation radical salts of naphthalene peri-diselenides with S = 5/2 magnetic anions
Pariyacheri Padikkal, Hrudya; Jeannin, Olivier; Rouzières, Mathieu; Clérac, Rodolphe; Jeon, Ie-Rang; Fourmigué, Marc; Dalton Transactions  (2026) –; doi:10.1039/D6DT00277C

data_7720585
_publ_section_title
;
 Chalcogen bond activation in cation radical salts of naphthalene
 <i>peri</i>-diselenides with <i>S</i> = 5/2 magnetic anions.
;
_journal_issue                   14
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              5511
_journal_page_last               5518
_journal_paper_doi               10.1039/d6dt00277c
_journal_volume                  55
_journal_year                    2026
_chemical_formula_moiety         'C12 H10 O2 Se2, Cl4 Fe'
_chemical_formula_sum            'C12 H10 Cl4 Fe O2 Se2'
_chemical_formula_weight         541.77
_chemical_name_systematic
'(2,7-dimethoxynaphtalene peri-diselenide) tetrachloroferrate'
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
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_audit_creation_date             2023-04-26T17:26:15-00:00
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_audit_update_record
;
2025-10-23 deposited with the CCDC.	2026-03-05 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 102.284(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.8876(6)
_cell_length_b                   24.250(2)
_cell_length_c                   10.5956(10)
_cell_measurement_reflns_used    9899
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.51
_cell_measurement_theta_min      2.59
_cell_measurement_wavelength     0.71073
_cell_volume                     1729.2(3)
_computing_cell_refinement       'APEX3 (Bruker, 2015)'
_computing_data_collection       'Bruker APEX3 (Bruker, 2015)'
_computing_data_reduction        'SAINT (Bruker, 2014)'
_computing_molecular_graphics    'Ortep for Windows (Farrugia, 2012)'
_computing_publication_material  'WinGX publication routines (Farrugia, 2012)'
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_computing_structure_solution    'SHELXT-2018/2 (Sheldrick, 2015)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector                 CMOS-PHOTON70
_diffrn_detector_area_resol_mean 7.39
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'D8 VENTURE Bruker AXS'
_diffrn_measurement_method       'rotation images'
_diffrn_orient_matrix_UB_11      0.114031
_diffrn_orient_matrix_UB_12      -0.01357
_diffrn_orient_matrix_UB_13      0.067703
_diffrn_orient_matrix_UB_21      0.040127
_diffrn_orient_matrix_UB_22      -0.025258
_diffrn_orient_matrix_UB_23      -0.064566
_diffrn_orient_matrix_UB_31      0.086407
_diffrn_orient_matrix_UB_32      0.029638
_diffrn_orient_matrix_UB_33      -0.024025
_diffrn_radiation_monochromator  'multilayer monochromator'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'Incoatec microfocus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0356
_diffrn_reflns_av_unetI/netI     0.0253
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            23280
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_reduction_process
;
        Scaled and merged with Sortav
        R.H. Blessing, (1987) Cryst. Rev. 1, 3-58
        R.H. Blessing, (1989) J. Appl. Cryst. 22, 396-397
;
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.51
_diffrn_reflns_theta_min         2.587
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    5.698
_exptl_absorpt_correction_T_max  0.843
_exptl_absorpt_correction_T_min  0.718
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
  [Sheldrick, G.M. (2014). SADABS Bruker AXS Inc., Madison, Wisconsin, USA]
;
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    2.081
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1040
_exptl_crystal_recrystallization_method Electrocrystallization
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.492
_refine_diff_density_min         -0.433
_refine_diff_density_rms         0.076
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.089
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_constraints    0
_refine_ls_number_parameters     192
_refine_ls_number_reflns         3961
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.089
_refine_ls_R_factor_all          0.0302
_refine_ls_R_factor_gt           0.0242
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0071P)^2^+2.0156P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0463
_refine_ls_wR_factor_ref         0.0479
_reflns_Friedel_coverage         0
_reflns_number_gt                3487
_reflns_number_total             3961
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d6dt00277c2.cif
_cod_data_source_block           shelx
_cod_depositor_comments
'Adding full bibliography for 7720585--7720589.cif.'
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7720585
_shelx_shelxl_version_number     2018/3
_shelx_res_checksum              8045
_shelx_hkl_checksum              3726