# Electronic Supplementary Material (ESI) for ChemComm.
# This journal is © The Royal Society of Chemistry 2022

####################################################################### 
# 
# This file contains crystal structure data downloaded from the 
# Cambridge Structural Database (CSD) hosted by the Cambridge 
# Crystallographic Data Centre (CCDC).
# 
# Full information about CCDC data access policies and citation 
# guidelines are available at http://www.ccdc.cam.ac.uk/access/V1 
# 
# Audit and citation data items may have been added by the CCDC. 
# Please retain this information to preserve the provenance of 
# this file and to allow appropriate attribution of the data. 
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data_tt
_database_code_depnum_ccdc_archive 'CCDC 2076234'
loop_
_audit_author_name
_audit_author_address
ZhongWentao
;South China University of Technology
China
;
_audit_update_record             
;
2021-04-08 deposited with the CCDC.	2022-05-09 downloaded from the CCDC.
;
_audit_creation_date             2020-12-30
_audit_creation_method           
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_shelx_SHELXL_version_number     2018/3
_chemical_name_common            ?
_chemical_name_systematic        ?
_chemical_formula_moiety         '0.5(C36 H32 Se2)'
_chemical_formula_sum            'C18 H16 Se'
_chemical_formula_weight         311.27
_chemical_melting_point          ?
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
C C 0.0033 0.0016 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
H H 0.0000 0.0000 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Se Se -0.0929 2.2259 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'

_shelx_space_group_comment       
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
_space_group_crystal_system      orthorhombic
_space_group_IT_number           64
_space_group_name_H-M_alt        'C m c e'
_space_group_name_Hall           '-C 2bc 2'
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-x, -y+1/2, z+1/2'
'x, -y, -z'
'-x, y+1/2, -z+1/2'
'x+1/2, y+1/2, z'
'-x+1/2, -y+1, z+1/2'
'x+1/2, -y+1/2, -z'
'-x+1/2, y+1, -z+1/2'
'-x, -y, -z'
'x, y-1/2, -z-1/2'
'-x, y, z'
'x, -y-1/2, z-1/2'
'-x+1/2, -y+1/2, -z'
'x+1/2, y, -z-1/2'
'-x+1/2, y+1/2, z'
'x+1/2, -y, z-1/2'

_cell_length_a                   5.8303(2)
_cell_length_b                   33.0703(13)
_cell_length_c                   14.6045(5)
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_volume                     2815.89(18)
_cell_formula_units_Z            8
_cell_measurement_reflns_used    2615
_cell_measurement_temperature    150
_cell_measurement_theta_max      25.858
_cell_measurement_theta_min      2.789
_shelx_estimated_absorpt_T_max   0.949
_shelx_estimated_absorpt_T_min   0.742
_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 λ/2 correction factor is Not present.'
_exptl_absorpt_special_details   ?
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.468
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    ?
_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
_exptl_transmission_factor_max   ?
_exptl_transmission_factor_min   ?
_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_ambient_temperature      150.0
_diffrn_detector_area_resol_mean ?
_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       'ω scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_source                   ?
_diffrn_standards_number         0
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                1158
_reflns_number_total             1591
_reflns_special_details          
;
 Reflections were merged by SHELXL according to the crystal
 class for the calculation of statistics and refinement.
 
 _reflns_Friedel_fraction is defined as the number of unique
 Friedel pairs measured divided by the number that would be
 possible theoretically, ignoring centric projections and
 systematic absences.
;
_reflns_threshold_expression     'I > 2σ(I)'
_computing_cell_refinement       'SAINT V8.40A (?, 2016)'
_computing_data_collection       ?
_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)'
_refine_diff_density_max         0.656
_refine_diff_density_min         -0.625
_refine_diff_density_rms         0.093
_refine_ls_extinction_coef       .
_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_R_factor_all          0.0738
_refine_ls_R_factor_gt           0.0396
_refine_ls_restrained_S_all      1.098
_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/[σ²(Fo²)+(0.0062P)²+8.6114P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0625
_refine_ls_wR_factor_ref         0.0758
_refine_special_details          ?
_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)
;
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   ?
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_site_symmetry_order
_atom_site_calc_flag
_atom_site_refinement_flags_posn
_atom_site_refinement_flags_adp
_atom_site_refinement_flags_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
Se1 Se 1.000000 0.28230(2) 0.66179(3) 0.03043(16) Uani 1 2 d S T P . .
C9 C 0.5849(10) 0.26622(18) 0.5832(4) 0.0271(14) Uani 0.5 1 d D U . A -1
H9 H 0.454089 0.252749 0.559215 0.033 Uiso 0.5 1 calc R . . A -1
C8 C 0.7632(11) 0.24518(19) 0.6197(4) 0.0252(14) Uani 0.5 1 d D U . A -1
C10 C 0.6013(10) 0.30876(19) 0.5821(4) 0.0291(15) Uani 0.5 1 d D U . A -1
H10 H 0.483422 0.325457 0.557911 0.035 Uiso 0.5 1 calc R . . A -1
C1 C 0.8037(7) 0.20120(8) 0.6250(3) 0.0245(14) Uani 0.5 1 d . U . A -1
C6 C 0.6407(6) 0.17486(12) 0.5893(3) 0.0296(15) Uani 0.5 1 d G U . A -1
H6 H 0.502255 0.185188 0.564243 0.036 Uiso 0.5 1 calc R . . A -1
C5 C 0.6803(6) 0.13342(11) 0.5904(3) 0.0345(16) Uani 0.5 1 d G U . A -1
H5 H 0.568948 0.115419 0.566040 0.041 Uiso 0.5 1 calc R . . A -1
C4 C 0.8829(7) 0.11831(8) 0.6271(3) 0.0366(17) Uani 0.5 1 d G . . A -1
C3 C 1.0459(6) 0.14464(11) 0.6627(2) 0.0305(17) Uani 0.5 1 d G U . A -1
H3 H 1.184359 0.134314 0.687803 0.037 Uiso 0.5 1 calc R . . A -1
C2 C 1.0063(6) 0.18609(10) 0.6617(2) 0.0285(10) Uani 0.5 1 d G U . A -1
H2 H 1.117671 0.204084 0.686006 0.034 Uiso 0.5 1 calc R . . A -1
C11 C 0.7990(10) 0.32430(19) 0.6183(4) 0.0257(14) Uani 0.5 1 d D U . A -1
C7 C 0.9302(14) 0.07251(18) 0.6287(5) 0.052(2) Uani 0.5 1 d . U . A -1
H7A H 0.870400 0.060955 0.685740 0.078 Uiso 0.5 1 calc GR . . A -1
H7B H 1.095819 0.067756 0.625143 0.078 Uiso 0.5 1 calc GR . . A -1
H7C H 0.854315 0.059671 0.576388 0.078 Uiso 0.5 1 calc GR . . A -1
C13 C 1.0871(7) 0.37662(11) 0.6623(3) 0.0303(17) Uani 0.5 1 d . . . A -1
H13 H 1.181089 0.355741 0.686547 0.036 Uiso 0.5 1 calc R . . A -1
C14 C 1.1605(6) 0.41658(13) 0.6657(3) 0.0327(15) Uani 0.5 1 d G U . A -1
H14 H 1.304661 0.423014 0.692317 0.039 Uiso 0.5 1 calc R . . A -1
C15 C 1.0231(8) 0.44713(9) 0.6302(3) 0.0398(15) Uani 0.5 1 d G U . A -1
C16 C 0.8122(8) 0.43772(11) 0.5912(3) 0.0394(18) Uani 0.5 1 d G . . A -1
H16 H 0.718210 0.458594 0.566966 0.047 Uiso 0.5 1 calc R . . A -1
C17 C 0.7388(6) 0.39775(14) 0.5878(3) 0.0342(16) Uani 0.5 1 d G . . A -1
H17 H 0.594633 0.391321 0.561196 0.041 Uiso 0.5 1 calc R . . A -1
C12 C 0.8762(8) 0.36721(9) 0.6233(3) 0.0274(18) Uani 0.5 1 d G U . A -1
C18 C 1.1060(13) 0.4910(2) 0.6354(5) 0.055(2) Uani 0.5 1 d . . . A -1
H18A H 1.083620 0.501271 0.697731 0.082 Uiso 0.5 1 calc GR . . A -1
H18B H 1.018339 0.507577 0.592260 0.082 Uiso 0.5 1 calc GR . . A -1
H18C H 1.269302 0.492174 0.619704 0.082 Uiso 0.5 1 calc GR . . A -1


_geom_special_details            
;
 All esds (except the esd in the dihedral angle between two l.s. planes)
 are estimated using the full covariance matrix.  The cell esds are taken
 into account individually in the estimation of esds in distances, angles
 and torsion angles; correlations between esds in cell parameters are only
 used when they are defined by crystal symmetry.  An approximate (isotropic)
 treatment of cell esds is used for estimating esds involving l.s. planes.
;
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
Se1 C8 1.947(6) . ?
Se1 C11 1.925(6) . ?
C9 C8 1.360(8) . ?
C9 C10 1.410(8) . ?
C8 C1 1.476(7) . ?
C10 C11 1.368(8) . ?
C1 C6 1.3900 . ?
C1 C2 1.3900 . ?
C6 C5 1.3900 . ?
C5 C4 1.3900 . ?
C4 C3 1.3900 . ?
C4 C7 1.539(6) . ?
C3 C2 1.3900 . ?
C11 C12 1.490(7) . ?
C13 C14 1.3900 . ?
C13 C12 1.3900 . ?
C14 C15 1.3900 . ?
C15 C16 1.3900 . ?
C15 C18 1.531(7) . ?
C16 C17 1.3900 . ?
C17 C12 1.3900 . ?

loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
_geom_angle_publ_flag
C11 Se1 C8 85.4(3) . . ?
C8 C9 C10 117.6(6) . . ?
C9 C8 Se1 110.1(5) . . ?
C9 C8 C1 130.3(6) . . ?
C1 C8 Se1 119.4(4) . . ?
C11 C10 C9 115.3(6) . . ?
C6 C1 C8 119.3(3) . . ?
C6 C1 C2 120.0 . . ?
C2 C1 C8 120.7(3) . . ?
C5 C6 C1 120.0 . . ?
C4 C5 C6 120.0 . . ?
C5 C4 C3 120.0 . . ?
C5 C4 C7 120.8(4) . . ?
C3 C4 C7 119.2(4) . . ?
C2 C3 C4 120.0 . . ?
C3 C2 C1 120.0 . . ?
C10 C11 Se1 111.7(5) . . ?
C10 C11 C12 129.1(6) . . ?
C12 C11 Se1 119.1(4) . . ?
C14 C13 C12 120.0 . . ?
C13 C14 C15 120.0 . . ?
C14 C15 C18 119.2(4) . . ?
C16 C15 C14 120.0 . . ?
C16 C15 C18 120.8(4) . . ?
C17 C16 C15 120.0 . . ?
C16 C17 C12 120.0 . . ?
C13 C12 C11 120.0(4) . . ?
C17 C12 C11 120.0(4) . . ?
C17 C12 C13 120.0 . . ?

_olex2_submission_special_instructions 'No special instructions were received'
