Atom Efficient Synthesis of Selectively Difluorinated Carbocycles through a Gold(I)-Catalyzed Cyclization.
McCarter, Adam W.; Sommer, Magdalena; Percy, Jonathan M.; Jamieson, Craig; Kennedy, Alan R.; Hirst, David J.; The Journal of organic chemistry 83 (2018) 8888–8905; doi:10.1021/acs.joc.8b01121

data_4035337
_publ_section_title
;
 Atom Efficient Synthesis of Selectively Difluorinated Carbocycles through
 a Gold(I)-Catalyzed Cyclization.
;
_journal_issue                   16
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              8888
_journal_page_last               8905
_journal_paper_doi               10.1021/acs.joc.8b01121
_journal_volume                  83
_journal_year                    2018
_chemical_formula_sum            'C9 H16 F2 O2'
_chemical_formula_weight         194.22
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_cell_setting           monoclinic
_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
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.654(13)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   23.884(3)
_cell_length_b                   7.4165(11)
_cell_length_c                   10.9080(15)
_cell_measurement_reflns_used    3398
_cell_measurement_temperature    130(2)
_cell_measurement_theta_max      27.8877
_cell_measurement_theta_min      3.3886
_cell_volume                     1925.8(5)
_computing_cell_refinement       CrysalisPro
_computing_data_collection       CrysalisPro
_computing_data_reduction        CrysalisPro
_computing_publication_material  SHELXL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    SHELXS
_diffrn_ambient_temperature      130(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.927
_diffrn_measurement_device_type  'Oxford Diffraction Xcalibur'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0414
_diffrn_reflns_av_sigmaI/netI    0.0329
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       -30
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            7929
_diffrn_reflns_theta_full        27.00
_diffrn_reflns_theta_max         27.95
_diffrn_reflns_theta_min         3.40
_exptl_absorpt_coefficient_mu    0.117
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.52176
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Oxford Diffraction Ltd.,
Version 1.171.34.40 (release 27-08-2010 CrysAlis171 .NET)
(compiled Aug 27 2010,11:50:40)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.340
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'sliver cut from large rod'
_exptl_crystal_F_000             832
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.364
_refine_diff_density_min         -0.208
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     129
_refine_ls_number_reflns         2148
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0544
_refine_ls_R_factor_gt           0.0437
_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^)+(0.0622P)^2^+0.8539P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1121
_refine_ls_wR_factor_ref         0.1223
_reflns_number_gt                1769
_reflns_number_total             2148
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            jo8b01121_si_002.cif
_cod_data_source_block           percy_ms
_cod_original_cell_volume        1925.9(5)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4035337