Water Overcomes Methyl Group Directing Effects in Epoxide-Opening Cascades
Christopher J. Morten; Timothy F. Jamison; Journal of the American Chemical Society 131 (2009) 6678–6679; doi:10.1021/ja9025243

data_4104396
_publ_section_title
;
 Water Overcomes Methyl Group Directing Effects in Epoxide-Opening
 Cascades
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              6678
_journal_page_last               6679
_journal_paper_doi               10.1021/ja9025243
_journal_volume                  131
_journal_year                    2009
_chemical_absolute_configuration ad
_chemical_formula_sum            'C12 H20 O4'
_chemical_formula_weight         228.28
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_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                 112.4120(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.4928(3)
_cell_length_b                   5.17550(10)
_cell_length_c                   11.2885(3)
_cell_measurement_reflns_used    9709
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      68.44
_cell_measurement_theta_min      4.24
_cell_volume                     566.72(3)
_computing_cell_refinement       'SAINT 7.46A (Bruker-AXS, 2008)'
_computing_data_collection       'APEX2 3.0 (Bruker-AXS, 2008)'
_computing_data_reduction        'SAINT 7.46A (Bruker-AXS, 2008)'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 8.3
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker Smart APEX CCD'
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0185
_diffrn_reflns_av_sigmaI/netI    0.0118
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            10799
_diffrn_reflns_theta_full        67.66
_diffrn_reflns_theta_max         67.66
_diffrn_reflns_theta_min         4.24
_exptl_absorpt_coefficient_mu    0.814
_exptl_absorpt_correction_T_max  0.9230
_exptl_absorpt_correction_T_min  0.6959
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.338
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             248
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.251
_refine_diff_density_min         -0.176
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.07(13)
_refine_ls_extinction_coef       0.0103(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.102
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     150
_refine_ls_number_reflns         2028
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      1.101
_refine_ls_R_factor_all          0.0283
_refine_ls_R_factor_gt           0.0281
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0503P)^2^+0.0865P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0839
_refine_ls_wR_factor_ref         0.0842
_reflns_number_gt                2005
_reflns_number_total             2028
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja9025243_si_002.cif
_cod_data_source_block           d09014
_cod_original_cell_volume        566.72(2)
_cod_database_code               4104396