Evidence Against Single-Electron Transfer in the Additions of Most Organomagnesium Reagents to Carbonyl Compounds.
Bartolo, Nicole D.; Woerpel, K. A.; The Journal of organic chemistry  (2020) –; doi:10.1021/acs.joc.0c00481

data_4038431
_publ_section_title
;
 Evidence Against Single-Electron Transfer in the Additions of Most
 Organomagnesium Reagents to Carbonyl Compounds.
;
_journal_name_full               'The Journal of organic chemistry'
_journal_paper_doi               10.1021/acs.joc.0c00481
_journal_year                    2020
_chemical_formula_sum            'C22 H18 O'
_chemical_formula_weight         298.36
_space_group_crystal_system      tetragonal
_space_group_IT_number           110
_space_group_name_Hall           'I 4bw -2c'
_space_group_name_H-M_alt        'I 41 c d'
_atom_sites_solution_hydrogens   mixed
_audit_creation_method           SHELXL-2018/3
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            16
_cell_length_a                   28.371(2)
_cell_length_b                   28.371(2)
_cell_length_c                   7.9856(6)
_cell_measurement_reflns_used    9897
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.77
_cell_measurement_theta_min      2.27
_cell_volume                     6427.7(8)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Diamond (Brakdenburg & Putz, 2014)'
_computing_structure_refinement  'SHELXL-2018/3 (Sheldrick, 2018)'
_computing_structure_solution    'SHELXT (Sheldrick 2015)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0372
_diffrn_reflns_av_unetI/netI     0.0225
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       37
_diffrn_reflns_limit_h_min       -37
_diffrn_reflns_limit_k_max       37
_diffrn_reflns_limit_k_min       -36
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            35844
_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         28.296
_diffrn_reflns_theta_min         1.435
_exptl_absorpt_coefficient_mu    0.074
_exptl_absorpt_correction_T_max  0.7457
_exptl_absorpt_correction_T_min  0.6677
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.233
_exptl_crystal_description       block
_exptl_crystal_F_000             2528
_exptl_crystal_size_max          0.560
_exptl_crystal_size_mid          0.360
_exptl_crystal_size_min          0.220
_refine_diff_density_max         0.368
_refine_diff_density_min         -0.172
_refine_diff_density_rms         0.047
_refine_ls_abs_structure_details
;
 Flack x determined using 1684 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.3(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.040
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     212
_refine_ls_number_reflns         4003
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.0472
_refine_ls_R_factor_gt           0.0449
_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^)+(0.0677P)^2^+4.0750P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1130
_refine_ls_wR_factor_ref         0.1148
_reflns_Friedel_coverage         0.864
_reflns_Friedel_fraction_full    0.999
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                3819
_reflns_number_total             4003
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo0c00481_si_002.cif
_cod_data_source_block           19kaw6h
_cod_original_cell_volume        6427.9(11)
_cod_database_code               4038431
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_min   0.960
_shelx_estimated_absorpt_t_max   0.984
_shelx_res_checksum              33314
_shelx_hkl_checksum              83705