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_4126583
_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 unk
_chemical_formula_moiety         'C25 H32 O4'
_chemical_formula_sum            'C25 H32 O4'
_chemical_formula_weight         396.50
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     SHELXT
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 92.834(2)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.6711(5)
_cell_length_b                   30.029(2)
_cell_length_c                   11.3380(8)
_cell_measurement_reflns_used    511
_cell_measurement_temperature    93(2)
_cell_measurement_theta_max      68.3
_cell_measurement_theta_min      2.9
_cell_volume                     2268.5(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 0.998
_diffrn_measured_fraction_theta_max 0.993
_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  0.0519
_diffrn_reflns_av_unetI/netI     0.0232
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.993
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       35
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            78956
_diffrn_reflns_point_group_measured_fraction_full 0.992
_diffrn_reflns_point_group_measured_fraction_max 0.987
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         67.870
_diffrn_reflns_theta_min         2.943
_diffrn_source                   'microfocus rotating anode'
_exptl_absorpt_coefficient_mu    0.614
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.865
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.161
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needel
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.240
_exptl_crystal_size_mid          0.020
_exptl_crystal_size_min          0.020
_refine_diff_density_max         0.923
_refine_diff_density_min         -0.406
_refine_diff_density_rms         0.073
_refine_ls_abs_structure_details
; 
 Flack x determined using 2833 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.34(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     541
_refine_ls_number_reflns         8128
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.031
_refine_ls_R_factor_all          0.0956
_refine_ls_R_factor_gt           0.0827
_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^)+(0.1617P)^2^+1.7838P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2333
_refine_ls_wR_factor_ref         0.2486
_reflns_Friedel_coverage         0.948
_reflns_Friedel_fraction_full    0.987
_reflns_Friedel_fraction_max     0.981
_reflns_number_gt                6798
_reflns_number_total             8128
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja7b09176_si_006.cif
_cod_data_source_block           007-16199
_cod_original_cell_volume        2268.6(3)
_cod_database_code               4126583
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.867
_shelx_estimated_absorpt_t_max   0.988
_shelx_res_checksum              57977
_shelx_hkl_checksum              32079