Protonation-controlled axial chirality in maleopimaric imides
Yao, Guiyang; Li, Yajun; Zhu, Yongtao; Pan, Yingming; Huang, Fuping; Wang, Hengshan; Liao, Zhixin; New Journal of Chemistry 38 (2014) 693–; doi:10.1039/c3nj01194a

data_7053854
_publ_section_title
;
 Protonation-controlled axial chirality in maleopimaric imides
;
_journal_issue                   2
_journal_name_full               'New Journal of Chemistry'
_journal_page_first              693
_journal_paper_doi               10.1039/c3nj01194a
_journal_volume                  38
_journal_year                    2014
_chemical_formula_sum            'C34 H40 N2 O4'
_chemical_formula_weight         540.68
_space_group_IT_number           19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.54394(18)
_cell_length_b                   14.0556(4)
_cell_length_c                   24.3015(7)
_cell_measurement_temperature    293(2)
_cell_volume                     2918.37(13)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0444
_diffrn_reflns_av_sigmaI/netI    0.0248
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -30
_diffrn_reflns_number            36456
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.90
_exptl_absorpt_coefficient_mu    0.080
_exptl_absorpt_correction_T_max  0.9810
_exptl_absorpt_correction_T_min  0.9656
_exptl_crystal_density_diffrn    1.231
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1160
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.35
_exptl_crystal_size_min          0.24
_refine_diff_density_max         0.194
_refine_diff_density_min         -0.131
_refine_diff_density_rms         0.030
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.7(14)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     366
_refine_ls_number_reflns         5974
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0476
_refine_ls_R_factor_gt           0.0431
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0508P)^2^+0.5494P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1085
_refine_ls_wR_factor_ref         0.1118
_reflns_number_gt                5434
_reflns_number_total             5974
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3nj01194a.txt
_cod_data_source_block           whs-zyt-5f
_cod_database_code               7053854