Effect of the trifluoromethyl group on torquoselectivity in the 4π ring-opening reaction of oxetenes: stereoselective synthesis of tetrasubstituted olefins
Aikawa, Kohsuke; Shimizu, Natsumi; Honda, Kazuya; Hioki, Yūta; Mikami, Koichi; Chemical Science 5 (2014) 410–; doi:10.1039/c3sc52548a

data_1513705
_publ_section_title
;
 Effect of the trifluoromethyl group on torquoselectivity in the 4\p
 ring-opening reaction of oxetenes: stereoselective synthesis of
 tetrasubstituted olefins
;
_journal_issue                   1
_journal_name_full               'Chemical Science'
_journal_page_first              410
_journal_paper_doi               10.1039/c3sc52548a
_journal_volume                  5
_journal_year                    2014
_chemical_formula_moiety         'C20 H13 F6 N O6'
_chemical_formula_sum            'C20 H13 F6 N O6'
_chemical_formula_weight         477.32
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.0000
_cell_angle_beta                 92.449(6)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            8
_cell_length_a                   22.067(11)
_cell_length_b                   6.117(3)
_cell_length_c                   29.455(15)
_cell_measurement_reflns_used    4541
_cell_measurement_temperature    93
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.70
_cell_volume                     3972(3)
_computing_cell_refinement       'CrystalClear-SM Expert 2.0 r4'
_computing_data_collection       'CrystalClear-SM Expert 2.0 r4 (Rigaku, 2009)'
_computing_data_reduction        'CrystalClear-SM Expert 2.0 r4'
_computing_molecular_graphics    'CrystalStructure 4.0'
_computing_publication_material  'CrystalStructure 4.0 (Rigaku, 2011)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'Il Milione (Burla, et al., 2007)'
_diffrn_ambient_temperature      93
_diffrn_detector_area_resol_mean 6.827
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Rigaku XtaLAB mini'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0249
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            13294
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.77
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.153
_exptl_absorpt_correction_T_max  0.991
_exptl_absorpt_correction_T_min  0.903
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.596
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1936.00
_exptl_crystal_size_max          0.260
_exptl_crystal_size_mid          0.090
_exptl_crystal_size_min          0.060
_refine_diff_density_max         0.34
_refine_diff_density_min         -0.29
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.048
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     299
_refine_ls_number_reflns         4538
_refine_ls_number_restraints     0
_refine_ls_R_factor_gt           0.0417
_refine_ls_shift/su_max          0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0514P)^2^+4.4287P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1140
_reflns_number_gt                3433
_reflns_number_total             4538
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            c3sc52548a.txt
_cod_data_source_block           SX031
_cod_database_code               1513705