Synthesis, X-ray characterization and theoretical study of all-cis 1,4:2,3:5,8:6,7-tetraepoxynaphthalenes: on the importance of through-space α-effect
Le , Anh T.; Tran, Thanh Van Thi; Le, Duan T.; Gomila, Rosa Maria; Frontera, Antonio; Zubkov, Fedor Ivanovich; CrystEngComm  (2021) –; doi:10.1039/D1CE01040A

data_7243629
_publ_section_title
;
 Synthesis, X-ray characterization and theoretical study of all-cis
 1,4:2,3:5,8:6,7-tetraepoxynaphthalenes: on the importance of
 through-space \a-effect
;
_journal_name_full               CrystEngComm
_journal_paper_doi               10.1039/D1CE01040A
_journal_year                    2021
_chemical_formula_moiety         'C16 H16 O9'
_chemical_formula_sum            'C16 H16 O9'
_chemical_formula_weight         352.29
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     difmap
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2021-07-09 deposited with the CCDC.	2021-09-29 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 91.59(3)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.4396(19)
_cell_length_b                   11.620(2)
_cell_length_c                   13.907(3)
_cell_measurement_reflns_used    600
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      36.0
_cell_measurement_theta_min      3.6
_cell_volume                     1524.8(5)
_computing_cell_refinement       iMosflm
_computing_data_collection       Automar
_computing_data_reduction        iMosflm
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/6 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device_type  'Rayonix SX165 CCD'
_diffrn_measurement_method       '/f scan'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.96990
_diffrn_reflns_av_R_equivalents  0.0832
_diffrn_reflns_av_unetI/netI     0.0484
_diffrn_reflns_Laue_measured_fraction_full 0.983
_diffrn_reflns_Laue_measured_fraction_max 0.977
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            38143
_diffrn_reflns_point_group_measured_fraction_full 0.983
_diffrn_reflns_point_group_measured_fraction_max 0.977
_diffrn_reflns_theta_full        35.587
_diffrn_reflns_theta_max         38.488
_diffrn_reflns_theta_min         3.607
_exptl_absorpt_coefficient_mu    0.277
_exptl_absorpt_correction_T_max  0.960
_exptl_absorpt_correction_T_min  0.930
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Scala (Evans, 2005)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.535
_exptl_crystal_description       prism
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.535
_refine_diff_density_min         -0.273
_refine_diff_density_rms         0.069
_refine_ls_extinction_coef       0.019(2)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     229
_refine_ls_number_reflns         3290
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0621
_refine_ls_R_factor_gt           0.0544
_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^)+(0.0756P)^2^+1.23P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1419
_refine_ls_wR_factor_ref         0.1469
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2746
_reflns_number_total             3290
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d1ce01040a2.cif
_cod_data_source_block           XB6544
_cod_original_cell_volume        1524.9(5)
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7243629
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.942
_shelx_estimated_absorpt_t_max   0.970
_shelx_res_checksum              15559
_shelx_hkl_checksum              5405