A Fluorine 1,2-Migration via Aryl Cation/Radical/Radical Anion/Radical Sequence.
Pretali, Luca; Dondi, Daniele; D'Angelantonio, Mila; Manet, Ilse; Fasani, Elisa; Monti, Sandra; Bovio, Bruna; Albini, Angelo; Organic letters 15 (2013) 3926–3929; doi:10.1021/ol401670p

data_1512204
_publ_contact_author
;
  Angelo Albini
  Dipartimento di Chimica
  University of Pavia
  via Taramelli 12, I-27100 Pavia, ITALY
;
_publ_section_title
;
 A Fluorine 1,2-Migration via Aryl Cation/Radical/Radical Anion/Radical
 Sequence.
;
_journal_issue                   15
_journal_name_full               'Organic letters'
_journal_page_first              3926
_journal_page_last               3929
_journal_paper_doi               10.1021/ol401670p
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         'C13 H11 F2 N O3'
_chemical_formula_sum            'C13 H11 F2 N O3'
_chemical_formula_weight         267.23
_chemical_name_systematic
;
Methyl-1-ethyl-7,8-difluoro-oxa-1,4-dihydroquinoline-3-carboxylate
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_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                90.0
_cell_angle_beta                 106.80(2)
_cell_angle_gamma                90.0
_cell_formula_units_Z            8
_cell_length_a                   20.550(4)
_cell_length_b                   6.890(6)
_cell_length_c                   17.530(4)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      12
_cell_measurement_theta_min      8
_cell_volume                     2376(2)
_computing_cell_refinement       'CAD4 (Enraf Nonius, 1992)'
_computing_data_collection       'CAD4 (Enraf Nonius, 1992)'
_computing_data_reduction        'CAD4 (Enraf Nonius, 1992)'
_computing_molecular_graphics    'Ortep, (Johnson, 1965)'
_computing_publication_material  Geom
_computing_structure_refinement  'Shelxl-93 (Sheldrick, 2008)'
_computing_structure_solution    'Shelxl-93 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device       'Enraf Nonius CAD4'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  Graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.710738
_diffrn_reflns_av_R_equivalents  0.0241
_diffrn_reflns_av_sigmaI/netI    0.0559
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            2167
_diffrn_reflns_theta_full        24.97
_diffrn_reflns_theta_max         24.97
_diffrn_reflns_theta_min         2.07
_diffrn_standards_decay_%        0
_diffrn_standards_interval_time  240
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    0.1279
_exptl_absorpt_correction_T_max  0.997
_exptl_absorpt_correction_T_min  0.880
_exptl_absorpt_correction_type   psi-scan
_exptl_absorpt_process_details
;
North A.C.T., Phillips D.C. & Mathews F.S. (1968) Acta. Cryst. A24, 351
;
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.494
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Needles
_exptl_crystal_F_000             1104
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.252
_refine_diff_density_min         -0.272
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.992
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     183
_refine_ls_number_reflns         2088
_refine_ls_number_restraints     24
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.1664
_refine_ls_R_factor_gt           0.0690
_refine_ls_shift/su_max          0.026
_refine_ls_shift/su_mean         0.003
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0938P)^2^+1.9543P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1643
_refine_ls_wR_factor_ref         0.2209
_reflns_number_gt                889
_reflns_number_total             2088
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ol401670p_si_002.cif
_cod_data_source_block           Compound_9a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1512204