An Experimental and Computational Approach to Defining Structure/Reactivity Relationships for Intramolecular Addition Reactions to Bicyclic Epoxonium Ions
Shuangyi Wan; Hakan Gunaydin; K. N. Houk; Paul E. Floreancig; Journal of the American Chemical Society 129 (2007) 7915–7923; doi:10.1021/ja0709674

data_4109555
_publ_section_title
;
 An Experimental and Computational Approach to Defining
 Structure/Reactivity Relationships for Intramolecular Addition Reactions
 to Bicyclic Epoxonium Ions
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              7915
_journal_page_last               7923
_journal_paper_doi               10.1021/ja0709674
_journal_volume                  129
_journal_year                    2007
_chemical_absolute_configuration syn
_chemical_formula_sum            'C14 H20 O6'
_chemical_formula_weight         284.30
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_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
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.4200(5)
_cell_length_b                   10.9803(7)
_cell_length_c                   15.4279(9)
_cell_measurement_temperature    295(2)
_cell_volume                     1426.37(15)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      295(2)
_diffrn_measured_fraction_theta_full 0.990
_diffrn_measured_fraction_theta_max 0.990
_diffrn_measurement_device_type  'Bruker Smart Apex'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0244
_diffrn_reflns_av_sigmaI/netI    0.0163
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            18941
_diffrn_reflns_theta_full        32.50
_diffrn_reflns_theta_max         32.50
_diffrn_reflns_theta_min         2.28
_exptl_absorpt_coefficient_mu    0.103
_exptl_absorpt_correction_T_max  0.9766
_exptl_absorpt_correction_T_min  0.9647
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.324
_exptl_crystal_description       Block
_exptl_crystal_F_000             608
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.23
_refine_diff_density_max         0.369
_refine_diff_density_min         -0.215
_refine_diff_density_rms         0.059
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.311
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     261
_refine_ls_number_reflns         2898
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.311
_refine_ls_R_factor_all          0.0645
_refine_ls_R_factor_gt           0.0580
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0780P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1366
_refine_ls_wR_factor_ref         0.1409
_reflns_number_gt                2566
_reflns_number_total             2898
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0709674si20070220_111850.cif
_cod_data_source_block           flor805s
_cod_database_code               4109555