Synthesis of 1,2-diselenides via potassium persulfate mediated diselenation of allenamides with diselenides.
Tan, Xiao-Ju; Zhao, Kun; Zhong, Xue-Fang; Yang, Lan; Dong, Yi-Ming; Wang, Tian-Mi; Yu, Shengping; Zhao, Zhi-Gang; Li, Xiao-Xiao; Organic & Biomolecular Chemistry  (2022) –; doi:10.1039/D2OB00964A

data_7158795
_publ_section_title
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 Synthesis of 1,2-diselenides via potassium persulfate mediated
 diselenation of allenamides with diselenides.
;
_journal_name_full               'Organic &amp; Biomolecular Chemistry'
_journal_paper_doi               10.1039/D2OB00964A
_journal_year                    2022
_chemical_formula_moiety         'C28 H24 Cl N O2 S Se2'
_chemical_formula_sum            'C28 H24 Cl N O2 S Se2'
_chemical_formula_weight         631.91
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2021-05-19
_audit_creation_method
;
Olex2 1.3
(compiled 2020.11.12 svn.r5f609507 for OlexSys, GUI svn.r6272)
;
_audit_update_record
;
2022-04-13 deposited with the CCDC.	2022-07-25 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.7970(7)
_cell_length_b                   9.5081(10)
_cell_length_c                   31.917(3)
_cell_measurement_reflns_used    9952
_cell_measurement_temperature    303(2)
_cell_measurement_theta_max      24.400
_cell_measurement_theta_min      2.235
_cell_volume                     2669.6(4)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_computing_molecular_graphics    'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.3 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2014/7 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      303.0
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1147
_diffrn_reflns_av_unetI/netI     0.0641
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       41
_diffrn_reflns_limit_l_min       -41
_diffrn_reflns_number            54655
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.555
_diffrn_reflns_theta_min         2.235
_diffrn_source_current           1.4
_diffrn_source_power             0.07
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.974
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.5599
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1088 before and 0.0673 after correction.
The Ratio of minimum to maximum transmission is 0.7509.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_modifier   light
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.572
_exptl_crystal_description       plate
_exptl_crystal_F_000             1264
_exptl_crystal_size_max          0.43
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.303
_refine_diff_density_min         -0.396
_refine_diff_density_rms         0.056
_refine_ls_abs_structure_details
;
 Flack x determined using 1420 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.020(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.020
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     317
_refine_ls_number_reflns         6164
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.020
_refine_ls_R_factor_all          0.0707
_refine_ls_R_factor_gt           0.0321
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0254P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0649
_refine_ls_wR_factor_ref         0.0716
_reflns_Friedel_coverage         0.754
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.997
_reflns_number_gt                4044
_reflns_number_total             6164
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2ob00964a2.cif
_cod_data_source_block           mo_lxx_0518_0ma_a
_cod_database_code               7158795
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_max   0.842
_shelx_estimated_absorpt_t_min   0.361
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Secondary CH2 refined with riding coordinates:
 C27(H27A,H27B)
2.b Aromatic/amide H refined with riding coordinates:
 C(H), C3(H3), C4(H4), C5(H5), C6(H6), C7(H7), C9(H9), C10(H10), C12(H12),
 C13(H13), C16(H16), C17(H17), C19(H19), C20(H20), C22(H22), C23(H23), C24(H24),
  C25(H25), C26(H26)
2.c Idealised Me refined as rotating group:
 C14(H14A,H14B,H14C)
;
_shelx_res_checksum              49297
_olex2_submission_special_instructions 'No special instructions were received'