Stereoconvergent Negishi Arylations of Racemic Secondary Alkyl Electrophiles: Differentiating between a CF3 and an Alkyl Group.
Liang, Yufan; Fu, Gregory C.; Journal of the American Chemical Society 137 (2015) 9523–9526; doi:10.1021/jacs.5b04725

data_4124325
_publ_section_title
;
 Stereoconvergent Negishi Arylations of Racemic Secondary Alkyl
 Electrophiles: Differentiating between a CF3 and an Alkyl Group.
;
_journal_issue                   30
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              9523
_journal_page_last               9526
_journal_paper_doi               10.1021/jacs.5b04725
_journal_volume                  137
_journal_year                    2015
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C23 H20 F2 O'
_chemical_formula_sum            'C23 H20 F2 O'
_chemical_formula_weight         350.39
_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   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2014-01-19
_audit_creation_method
;
Olex2 1.2
(compiled 2013.12.10 svn.r2850 for OlexSys, GUI svn.r4736)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   5.66013(10)
_cell_length_b                   13.3182(2)
_cell_length_c                   23.7538(4)
_cell_measurement_reflns_used    9591
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      71.422
_cell_measurement_theta_min      3.721
_cell_volume                     1790.63(5)
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_temperature      120
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker Apex-II CCD'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0407
_diffrn_reflns_av_unetI/netI     0.0236
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       29
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            21566
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         71.834
_diffrn_reflns_theta_min         3.721
_exptl_absorpt_coefficient_mu    0.755
_exptl_absorpt_correction_T_max  0.7535
_exptl_absorpt_correction_T_min  0.6828
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2012/1 (Bruker,2012) was used for absorption correction.
wR2(int) was 0.0801 before and 0.0430 after correction.
The Ratio of minimum to maximum transmission is 0.9062.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.300
_exptl_crystal_description       plate
_exptl_crystal_F_000             736
_exptl_crystal_size_max          0.133
_exptl_crystal_size_mid          0.057
_exptl_crystal_size_min          0.012
_refine_diff_density_max         0.158
_refine_diff_density_min         -0.181
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details
;
 Flack x determined using 1395 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.04(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         3486
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0290
_refine_ls_R_factor_gt           0.0280
_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^)+(0.0430P)^2^+0.2710P]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0726
_refine_ls_wR_factor_ref         0.0734
_reflns_Friedel_coverage         0.706
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.994
_reflns_number_gt                3384
_reflns_number_total             3486
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja5b04725_si_002.cif
_cod_data_source_block           crystal02
_cod_database_code               4124325
_shelxl_version_number           2013-2
_shelx_estimated_absorpt_t_max   0.991
_shelx_estimated_absorpt_t_min   0.906
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
2.a Ternary CH refined with riding coordinates:
 C9(H9)
2.b Secondary CH2 refined with riding coordinates:
 C16(H16A,H16B), C17(H17A,H17B)
2.c Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4), C5(H5), C11(H11), C12(H12), C13(H13),
 C14(H14), C15(H15), C19(H19), C20(H20), C21(H21), C22(H22), C23(H23)
;