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_4035338
_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            'C8 H14 F2 O2'
_chemical_formula_weight         180.19
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_atom_sites_solution_hydrogens   mixed
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_cell_angle_beta                 100.490(4)
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_cell_length_c                   11.4322(4)
_cell_measurement_reflns_used    2178
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      72.3590
_cell_measurement_theta_min      3.9380
_cell_volume                     2581.17(18)
_computing_cell_refinement       CrysalisPro
_computing_data_collection       CrysalisPro
_computing_data_reduction        CrysalisPro
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    SHELXS
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.962
_diffrn_measurement_device_type  'Oxford Diffraction Gemini S'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0392
_diffrn_reflns_av_unetI/netI     0.0560
_diffrn_reflns_Laue_measured_fraction_full 0.986
_diffrn_reflns_Laue_measured_fraction_max 0.962
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            9605
_diffrn_reflns_point_group_measured_fraction_full 0.986
_diffrn_reflns_point_group_measured_fraction_max 0.962
_diffrn_reflns_theta_full        70.000
_diffrn_reflns_theta_max         73.393
_diffrn_reflns_theta_min         3.731
_diffrn_source                   'sealed tube'
_exptl_absorpt_coefficient_mu    1.084
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.76621
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.35 (release 13-08-2014 CrysAlis171 .NET)
(compiled Aug 13 2014,18:06:01)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.391
_exptl_crystal_description       'sliver cut from large block'
_exptl_crystal_F_000             1152
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.331
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_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     355
_refine_ls_number_reflns         4991
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0800
_refine_ls_R_factor_gt           0.0535
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0630P)^2^+0.5878P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1269
_refine_ls_wR_factor_ref         0.1446
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3536
_reflns_number_total             4991
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo8b01121_si_002.cif
_cod_data_source_block           adamsept16
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4035338
_shelx_shelxl_version_number     2014/7
_shelx_res_checksum              10890
_shelx_hkl_checksum              82690