Silver-catalyzed oxidative decarboxylation of difluoroacetates: efficient access to C-CF2 bond formation.
Wan, Wen; Ma, Guobin; Li, Jialiang; Chen, Yunrong; Hu, Qingyang; Li, Minjie; Jiang, Haizhen; Deng, Hongmei; Hao, Jian; Chemical communications (Cambridge, England) 52 (2016) 1598–1601; doi:10.1039/c5cc09179a

data_7118517
_publ_section_title
;
 Silver-catalyzed oxidative decarboxylation of difluoroacetates: efficient
 access to C-CF2 bond formation.
;
_journal_issue                   8
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              1598
_journal_page_last               1601
_journal_paper_doi               10.1039/c5cc09179a
_journal_volume                  52
_journal_year                    2016
_chemical_formula_moiety         'C21 H15 F2 N O'
_chemical_formula_sum            'C21 H15 F2 N O'
_chemical_formula_weight         335.34
_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
_audit_update_record
;
2015-04-10 deposited with the CCDC.
2015-11-30 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 92.524(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   5.498(5)
_cell_length_b                   9.083(8)
_cell_length_c                   16.538(15)
_cell_measurement_reflns_used    2109
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.10
_cell_measurement_theta_min      2.47
_cell_volume                     825.1(13)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_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      296(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0154
_diffrn_reflns_av_sigmaI/netI    0.0265
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            4258
_diffrn_reflns_theta_full        25.04
_diffrn_reflns_theta_max         25.04
_diffrn_reflns_theta_min         2.47
_exptl_absorpt_coefficient_mu    0.098
_exptl_absorpt_correction_T_max  0.9922
_exptl_absorpt_correction_T_min  0.9730
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            white
_exptl_crystal_density_diffrn    1.350
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             348
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.106
_refine_diff_density_min         -0.092
_refine_diff_density_rms         0.022
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.0(6)
_refine_ls_extinction_coef       0.049(2)
_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   1.603
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     228
_refine_ls_number_reflns         2878
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.603
_refine_ls_R_factor_all          0.0354
_refine_ls_R_factor_gt           0.0311
_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^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0536
_refine_ls_wR_factor_ref         0.0549
_reflns_number_gt                2625
_reflns_number_total             2878
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c5cc09179a2.cif
_cod_data_source_block           140526a_0m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_original_sg_symbol_H-M      P2(1)
_cod_database_code               7118517