Supramolecular-induced regiocontrol over the photochemical [4 + 4] cyclodimerization of NHC- or azole-substituted anthracenes.
Bai, Sha; Ma, Li-Li; Yang, Tao; Wang, Fang; Wang, Li-Feng; Hahn, F. Ekkehardt; Wang, Yao-Yu; Han, Ying-Feng; Chemical science 12 (2020) 2165–2171; doi:10.1039/d0sc06017h

data_1559829
_publ_section_title
;
 Supramolecular-induced regiocontrol over the photochemical [4 + 4]
 cyclodimerization of NHC- or azole-substituted anthracenes.
;
_journal_issue                   6
_journal_name_full               'Chemical science'
_journal_page_first              2165
_journal_page_last               2171
_journal_paper_doi               10.1039/d0sc06017h
_journal_volume                  12
_journal_year                    2020
_chemical_formula_moiety         'C28 H18 N4'
_chemical_formula_sum            'C28 H18 N4'
_chemical_formula_weight         410.46
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     iterative
_audit_creation_date             2020-11-24
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2020-11-24 deposited with the CCDC.	2020-12-17 downloaded from the CCDC.
;
_cell_angle_alpha                69.264(5)
_cell_angle_beta                 78.354(5)
_cell_angle_gamma                79.800(6)
_cell_formula_units_Z            1
_cell_length_a                   6.4661(11)
_cell_length_b                   8.1703(13)
_cell_length_c                   10.3854(17)
_cell_measurement_reflns_used    4245
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      26.70
_cell_measurement_theta_min      2.68
_cell_volume                     499.20(14)
_computing_cell_refinement       'SAINT V8.38A (?, 2016)'
_computing_data_reduction        'SAINT V8.38A (?, 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    'olex2.solve (Bourhis et al., 2015)'
_diffrn_ambient_temperature      179.98
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.987
_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  0.0204
_diffrn_reflns_av_unetI/netI     0.0250
_diffrn_reflns_Laue_measured_fraction_full 0.991
_diffrn_reflns_Laue_measured_fraction_max 0.987
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            5617
_diffrn_reflns_point_group_measured_fraction_full 0.991
_diffrn_reflns_point_group_measured_fraction_max 0.987
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.697
_diffrn_reflns_theta_min         2.818
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.7454
_exptl_absorpt_correction_T_min  0.6717
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1301 before and 0.0429 after correction.
The Ratio of minimum to maximum transmission is 0.9011.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.365
_exptl_crystal_description       block
_exptl_crystal_F_000             214
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.690
_refine_diff_density_min         -0.294
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.104
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     145
_refine_ls_number_reflns         2082
_refine_ls_number_restraints     15
_refine_ls_restrained_S_all      1.147
_refine_ls_R_factor_all          0.0638
_refine_ls_R_factor_gt           0.0588
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0463P)^2^+0.4098P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1394
_refine_ls_wR_factor_ref         0.1432
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1903
_reflns_number_total             2082
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0sc06017h2.cif
_cod_data_source_block           mo_h2019121501_0m_a
_cod_depositor_comments
;Adding full bibliography for 1559823--1559829.cif.

 Adding full bibliography for 1559823--1559829.cif.
;
_cod_database_code               1559829
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.990
_shelx_estimated_absorpt_t_min   0.984
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
2. Rigid bond restraints
 C1, N2, C8
 with sigma for 1-2 distances of 0.001 and sigma for 1-3 distances of 0.002
3. Uiso/Uaniso restraints and constraints
Uanis(C1) \\sim Ueq, Uanis(N2) \\sim Ueq: with sigma of 0.002 and sigma for
terminal atoms of 0.01
4.a Aromatic/amide H refined with riding coordinates:
 C13(H13), C14(H14), C11(H11), C9(H9), C1(H1), C4(H4), C6(H6), C3(H3), C5(H5)
;
_shelx_res_checksum              81492
_olex2_submission_special_instructions 'No special instructions were received'