Catalytic Ring Expansions of Cyclic Alcohols Enabled by Proton-Coupled Electron Transfer.
Zhao, Kuo; Yamashita, Kenji; Carpenter, Joseph E.; Sherwood, Trevor C.; Ewing, William R.; Cheng, Peter T. W.; Knowles, Robert R.; Journal of the American Chemical Society 141 (2019) 8752–8757; doi:10.1021/jacs.9b03973

data_4127581
_publ_section_title
;
 Catalytic Ring Expansions of Cyclic Alcohols Enabled by Proton-Coupled
 Electron Transfer.
;
_journal_issue                   22
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              8752
_journal_page_last               8757
_journal_paper_doi               10.1021/jacs.9b03973
_journal_volume                  141
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_sum            'C28 H40 O2'
_chemical_formula_weight         408.60
_chemical_name_common            KY1-Mo
_space_group_crystal_system      triclinic
_space_group_IT_number           1
_space_group_name_Hall           'P 1'
_space_group_name_H-M_alt        'P 1'
_symmetry_space_group_name_Hall  'P 1'
_symmetry_space_group_name_H-M   'P 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                114.987(2)
_cell_angle_beta                 102.242(2)
_cell_angle_gamma                94.169(2)
_cell_formula_units_Z            1
_cell_length_a                   6.7263(5)
_cell_length_b                   9.6206(7)
_cell_length_c                   10.0133(7)
_cell_measurement_reflns_used    9875
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      36.3716
_cell_measurement_theta_min      2.3295
_cell_volume                     564.26(7)
_computing_cell_refinement       'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_data_collection       'Bruker Instrument Service v2014.11.0.1'
_computing_data_reduction        'SAINT V8.34A (Bruker AXS Inc., 2013)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXL-2014 (Sheldrick, 2014)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3333
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker Apex II CCD'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0193
_diffrn_reflns_av_unetI/netI     0.0203
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            33508
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         35.620
_diffrn_reflns_theta_min         2.330
_diffrn_source                   'fine focus tube'
_exptl_absorpt_coefficient_mu    0.073
_exptl_absorpt_correction_T_max  0.99
_exptl_absorpt_correction_T_min  0.93
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS V2014/2 (Bruker AXS Inc.)'
_exptl_crystal_density_diffrn    1.202
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             224
_exptl_crystal_size_max          0.315
_exptl_crystal_size_mid          0.248
_exptl_crystal_size_min          0.198
_refine_diff_density_max         0.435
_refine_diff_density_min         -0.180
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details
; 
 Flack x determined using 4643 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   -0.02(17)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     274
_refine_ls_number_reflns         10387
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0347
_refine_ls_R_factor_gt           0.0320
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0594P)^2^+0.0260P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0876
_refine_ls_wR_factor_ref         0.0899
_reflns_Friedel_coverage         0.999
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                9802
_reflns_number_total             10387
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja9b03973_si_004.cif
_cod_data_source_block           mo_PDJKY1_0m
_cod_database_code               4127581
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.977
_shelx_estimated_absorpt_t_max   0.986
_shelx_res_checksum              97243
_shelx_hkl_checksum              22969