Intramolecular Bromonium Ion Assisted Epoxide Ring-Opening: Capture of the Oxonium Ion with an Added External Nucleophile
Karl J. Bonney; D. Christopher Braddock; Andrew J. P. White; Muhammad Yaqoob; Journal of Organic Chemistry 76 (2011) 97–104; doi:10.1021/jo101617h

data_4025935
_publ_section_title
;
 Intramolecular Bromonium Ion Assisted Epoxide Ring-Opening: Capture of
 the Oxonium Ion with an Added External Nucleophile
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              97
_journal_page_last               104
_journal_paper_doi               10.1021/jo101617h
_journal_volume                  76
_journal_year                    2011
_chemical_formula_moiety         'C15 H16 Br N O5'
_chemical_formula_sum            'C15 H16 Br N O5'
_chemical_formula_weight         370.20
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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
_cell_angle_beta                 97.2047(12)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   11.91851(14)
_cell_length_b                   6.03915(9)
_cell_length_c                   21.2100(3)
_cell_measurement_reflns_used    3757
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      71.1668
_cell_measurement_theta_min      2.0960
_cell_volume                     1514.59(4)
_computing_cell_refinement       'CrysAlis RED, Oxford Diffraction Ltd'
_computing_data_collection       'CrysAlis CCD, Oxford Diffraction Ltd'
_computing_data_reduction        'CrysAlis RED, Oxford Diffraction Ltd'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_detector_area_resol_mean 8.2556
_diffrn_measured_fraction_theta_full 0.984
_diffrn_measured_fraction_theta_max 0.961
_diffrn_measurement_device_type  'OD Xcalibur PX Ultra'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance Ultra (Cu) X-ray Source'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0327
_diffrn_reflns_av_sigmaI/netI    0.0262
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -7
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            8778
_diffrn_reflns_theta_full        68.00
_diffrn_reflns_theta_max         71.41
_diffrn_reflns_theta_min         4.05
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    3.922
_exptl_absorpt_correction_T_max  0.649
_exptl_absorpt_correction_T_min  0.361
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
; 
CrysAlis RED, Oxford Diffraction Ltd., 
Version 1.171.32.29 (release 10-06-2008 CrysAlis171 .NET) 
(compiled Jun 10 2008,16:49:55) 
Analytical numeric absorption correction using a multifaceted crystal 
model based on expressions derived by R.C. Clark & J.S. Reid. 
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897) 
;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.623
_exptl_crystal_description       'blocky needles'
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.391
_refine_diff_density_min         -0.386
_refine_diff_density_rms         0.059
_refine_ls_extinction_coef       0.00179(18)
_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   1.038
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     200
_refine_ls_number_reflns         2841
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0509
_refine_ls_R_factor_gt           0.0363
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0438P)^2^+0.9111P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0849
_refine_ls_wR_factor_ref         0.0899
_reflns_number_gt                2272
_reflns_number_total             2841
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo101617h_si_001_3.cif
_cod_data_source_block           7b
_cod_database_code               4025935