Stereodynamic Quinone-Hydroquinone Molecules That Enantiomerize at sp(3)-Carbon via Redox-Interconversion.
Kim, Byoungmoo; Storch, Golo; Banerjee, Gourab; Mercado, Brandon Q.; Castillo-Lora, Janelle; Brudvig, Gary W.; Mayer, James M.; Miller, Scott J.; Journal of the American Chemical Society  (2017) –; doi:10.1021/jacs.7b09176

data_4126585
_publ_section_title
;
 Stereodynamic Quinone-Hydroquinone Molecules That Enantiomerize at
 sp(3)-Carbon via Redox-Interconversion.
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_paper_doi               10.1021/jacs.7b09176
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C25 H34 O4'
_chemical_formula_sum            'C25 H34 O4'
_chemical_formula_weight         398.52
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     SHELXT
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.9748(8)
_cell_length_b                   12.0537(8)
_cell_length_c                   17.2557(12)
_cell_measurement_reflns_used    621
_cell_measurement_temperature    93(2)
_cell_measurement_theta_max      68.3
_cell_measurement_theta_min      2.6
_cell_volume                     2282.7(3)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)'
_computing_data_collection       'CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)'
_computing_data_reduction        'CrystalClear-SM Expert 2.0 r15 (Rigaku, 2011)'
_computing_molecular_graphics
; 
Dolomanov, O.V.; Bourhis, L.J.; Gildea, R.J.; Howard, J.A.K.; Puschmann, H., 
OLEX2: A complete structure solution, refinement and analysis program 
(2009). J. Appl. Cryst., 42, 339-341. 
;
_computing_publication_material  'CIFTAB-2014/2 (Sheldrick, 2014)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXT-2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      93(2)
_diffrn_detector_area_resol_mean 22.2
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Rigaku Saturn 944+ CCD'
_diffrn_measurement_method       \w
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0478
_diffrn_reflns_av_unetI/netI     0.0145
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            78258
_diffrn_reflns_point_group_measured_fraction_full 0.993
_diffrn_reflns_point_group_measured_fraction_max 0.993
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         67.721
_diffrn_reflns_theta_min         4.474
_diffrn_source                   'microfocus rotating anode'
_exptl_absorpt_coefficient_mu    0.611
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.866
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.160
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             864
_exptl_crystal_size_max          0.200
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.020
_refine_diff_density_max         0.115
_refine_diff_density_min         -0.122
_refine_diff_density_rms         0.028
_refine_ls_abs_structure_details
; 
 Flack x determined using 1631 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -0.02(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     279
_refine_ls_number_reflns         4110
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0283
_refine_ls_R_factor_gt           0.0260
_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^)+(0.0301P)^2^+0.4134P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0627
_refine_ls_wR_factor_ref         0.0637
_reflns_Friedel_coverage         0.748
_reflns_Friedel_fraction_full    0.988
_reflns_Friedel_fraction_max     0.987
_reflns_number_gt                3910
_reflns_number_total             4110
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b09176_si_002.cif
_cod_data_source_block           007-16241
_cod_database_code               4126585
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.888
_shelx_estimated_absorpt_t_max   0.988
_shelx_res_checksum              44939
_shelx_hkl_checksum              89475