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_1513707
_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           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 94.339(4)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            8
_cell_length_a                   10.5731(7)
_cell_length_b                   28.9962(19)
_cell_length_c                   13.1962(9)
_cell_measurement_reflns_used    7856
_cell_measurement_temperature    93
_cell_measurement_theta_max      27.50
_cell_measurement_theta_min      2.60
_cell_volume                     4034.1(5)
_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    'SIR2004 (Burla, et al., 2005)'
_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  0.0547
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       37
_diffrn_reflns_limit_k_min       -36
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            28233
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.61
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.151
_exptl_absorpt_correction_T_max  0.987
_exptl_absorpt_correction_T_min  0.875
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'REQAB (Rigaku, 1998)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.572
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1936.00
_exptl_crystal_size_max          0.260
_exptl_crystal_size_mid          0.090
_exptl_crystal_size_min          0.090
_refine_diff_density_max         0.56
_refine_diff_density_min         -0.56
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     635
_refine_ls_number_reflns         9229
_refine_ls_number_restraints     2
_refine_ls_R_factor_gt           0.0590
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0437P)^2^+2.9187P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1363
_reflns_number_gt                6112
_reflns_number_total             9229
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            c3sc52548a.txt
_cod_data_source_block           SX032
_cod_database_code               1513707