Synthesis of 2,5-disubstituted selenophenes via a copper-catalyzed regioselective [2+2+1] cyclization of terminal alkynes and selenium
Zhong, Wentao; Li, Meng; Jin, Yangbin; Jiang, Huanfeng; Wu, Wanqing; Chemical Communications  (2022) –; doi:10.1039/D2CC00958G

data_7130103
_publ_section_title
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 Synthesis of 2,5-disubstituted selenophenes via a copper-catalyzed
 regioselective [2+2+1] cyclization of terminal alkynes and selenium
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/D2CC00958G
_journal_year                    2022
_chemical_formula_moiety         '0.5(C36 H32 Se2)'
_chemical_formula_sum            'C18 H16 Se'
_chemical_formula_weight         311.27
_space_group_crystal_system      orthorhombic
_space_group_IT_number           64
_space_group_name_Hall           '-C 2ac 2'
_space_group_name_H-M_alt        'C m c e'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2020-12-30
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2021-04-08 deposited with the CCDC.	2022-05-09 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   5.8303(2)
_cell_length_b                   33.0703(13)
_cell_length_c                   14.6045(5)
_cell_measurement_reflns_used    2615
_cell_measurement_temperature    150
_cell_measurement_theta_max      25.858
_cell_measurement_theta_min      2.789
_cell_volume                     2815.89(18)
_computing_cell_refinement       'SAINT V8.40A (?, 2016)'
_computing_data_reduction        'SAINT V8.40A (?, 2016)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      150.0
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0797
_diffrn_reflns_av_unetI/netI     0.0519
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       40
_diffrn_reflns_limit_k_min       -38
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            10638
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.380
_diffrn_reflns_theta_min         2.464
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    2.650
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.5884
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.0979 before and 0.0586 after correction. The Ratio of minimum to maximum transmission is 0.7894. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.468
_exptl_crystal_description       needle
_exptl_crystal_F_000             1264
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.656
_refine_diff_density_min         -0.625
_refine_diff_density_rms         0.093
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.092
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     147
_refine_ls_number_reflns         1591
_refine_ls_number_restraints     79
_refine_ls_restrained_S_all      1.098
_refine_ls_R_factor_all          0.0738
_refine_ls_R_factor_gt           0.0396
_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^)+(0.0062P)^2^+8.6114P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0625
_refine_ls_wR_factor_ref         0.0758
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1158
_reflns_number_total             1591
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2cc00958g2.cif
_cod_data_source_block           tt
_cod_original_sg_symbol_Hall     '-C 2bc 2'
_cod_database_code               7130103
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.949
_shelx_estimated_absorpt_t_min   0.742
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2. Restrained distances
 C10-C11 \\sim C8-C9
 with sigma of 0.02
3. Uiso/Uaniso restraints and constraints
Uanis(C12) \\sim Ueq: with sigma of 0.005 and sigma for terminal atoms of 0.01
Uanis(C3) \\sim Ueq, Uanis(C2) \\sim Ueq, Uanis(C1) \\sim Ueq, Uanis(C7) \\sim
Ueq, Uanis(C5) \\sim Ueq, Uanis(C6) \\sim Ueq, Uanis(C8) \\sim Ueq, Uanis(C11)
\\sim Ueq, Uanis(C10) \\sim Ueq, Uanis(C9) \\sim Ueq, Uanis(C12) \\sim Ueq,
Uanis(C14) \\sim Ueq, Uanis(C15) \\sim Ueq: with sigma of 0.005 and sigma for
terminal atoms of 0.01
4. Others
 Fixed Sof: C9(0.5) H9(0.5) C8(0.5) C10(0.5) H10(0.5) C1(0.5) C6(0.5) H6(0.5)
 C5(0.5) H5(0.5) C4(0.5) C3(0.5) H3(0.5) C2(0.5) H2(0.5) C11(0.5) C7(0.5)
 H7A(0.5) H7B(0.5) H7C(0.5) C13(0.5) H13(0.5) C14(0.5) H14(0.5) C15(0.5)
 C16(0.5) H16(0.5) C17(0.5) H17(0.5) C12(0.5) C18(0.5) H18A(0.5) H18B(0.5)
 H18C(0.5)
5.a Aromatic/amide H refined with riding coordinates:
 C9(H9), C10(H10), C6(H6), C5(H5), C3(H3), C2(H2), C13(H13), C14(H14),
 C16(H16), C17(H17)
5.b Fitted hexagon refined as free rotating group:
 C1(C6,C5,C4,C3,C2), C13(C14,C15,C16,C17,C12)
5.c Idealised Me refined as rotating group:
 C7(H7A,H7B,H7C), C18(H18A,H18B,H18C)
;
_olex2_submission_special_instructions 'No special instructions were received'