Transition metal mediated formation of dicationic diselenides stabilised by N-heterocyclic carbenes: designed synthesis.
Yadav, Sangeeta; Manjare, Sudesh T.; Singh, Harkesh B.; Butcher, Ray J.; Dalton transactions (Cambridge, England : 2003) 45 (2016) 12015–12027; doi:10.1039/c6dt01425a

data_7039652
_publ_section_title
;
 Transition metal mediated formation of dicationic diselenides stabilised
 by N-heterocyclic carbenes: designed synthesis.
;
_journal_issue                   30
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              12015
_journal_page_last               12027
_journal_paper_doi               10.1039/c6dt01425a
_journal_volume                  45
_journal_year                    2016
_chemical_formula_moiety         'C26 H36 N4 Se2, Br4 Fe, Br '
_chemical_formula_sum            'C26 H36 Br5 Fe N4 Se2'
_chemical_formula_weight         1017.91
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2016-06-18 deposited with the CCDC.
2016-06-23 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 92.3693(16)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.5421(2)
_cell_length_b                   9.47186(16)
_cell_length_c                   29.2362(5)
_cell_measurement_reflns_used    11008
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      75.5517
_cell_measurement_theta_min      3.0231
_cell_volume                     3470.20(10)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_data_reduction
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CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
;
_computing_molecular_graphics    'SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean 10.5081
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Xcalibur, Ruby, Gemini'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0375
_diffrn_reflns_av_sigmaI/netI    0.0335
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -36
_diffrn_reflns_number            23159
_diffrn_reflns_theta_full        67.50
_diffrn_reflns_theta_max         75.74
_diffrn_reflns_theta_min         3.03
_exptl_absorpt_coefficient_mu    12.801
_exptl_absorpt_correction_T_max  0.662
_exptl_absorpt_correction_T_min  0.106
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.21 (release 20-01-2012 CrysAlis171 .NET)
(compiled Jan 23 2012,18:06:46)
Analytical numeric absorption correction using a multifaceted crystal
            model based on expressions derived by R.C. Clark & J.S. Reid.
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897)
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.948
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'needle plate'
_exptl_crystal_F_000             1956
_exptl_crystal_size_max          0.4037
_exptl_crystal_size_mid          0.0926
_exptl_crystal_size_min          0.0344
_refine_diff_density_max         0.738
_refine_diff_density_min         -0.672
_refine_diff_density_rms         0.095
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     351
_refine_ls_number_reflns         7118
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0302
_refine_ls_R_factor_gt           0.0265
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0373P)^2^+0.3085P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0662
_refine_ls_wR_factor_ref         0.0685
_reflns_number_gt                6453
_reflns_number_total             7118
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c6dt01425a2.cif
_cod_data_source_block           12
_cod_depositor_comments
'Adding full bibliography for 7039650--7039655.cif.'
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7039652