Unexpected a,a’-difluoroethers from Ag(I)F and N-bromosuccinimide reactions of dibenzo[a,e]cyclooctatetraene
Fang, Zeguo; Gillatt, Roscoe; Slawin, Alexandra; Cordes, David Bradford; Carpenter-Warren, Cameron L.; O'Hagan, David; Chemical Communications  (2019) –; doi:10.1039/C9CC06426E

data_7124452
_publ_section_title
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 Unexpected a,a&#x2019;-difluoroethers from Ag(I)F and N-bromosuccinimide
 reactions of dibenzo[a,e]cyclooctatetraene
;
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/C9CC06426E
_journal_year                    2019
_chemical_formula_moiety         'C16 H12 F4'
_chemical_formula_sum            'C16 H12 F4'
_chemical_formula_weight         280.26
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2019-08-16
_audit_creation_method           'by CrystalStructure 4.3'
_audit_update_record
;
2019-08-16 deposited with the CCDC.	2019-11-04 downloaded from the CCDC.
;
_cell_angle_alpha                90.0000
_cell_angle_beta                 110.433(4)
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   12.7703(4)
_cell_length_b                   7.4822(2)
_cell_length_c                   13.8047(5)
_cell_measurement_reflns_used    6355
_cell_measurement_temperature    125
_cell_measurement_theta_max      74.45
_cell_measurement_theta_min      6.84
_cell_volume                     1236.05(8)
_computing_cell_refinement       'CrysAlisPro 1.171.39.8d (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.39.8d (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.39.8d (Rigaku OD, 2015)'
_computing_molecular_graphics    'CrystalStructure 4.3'
_computing_publication_material  'CrystalStructure 4.3 (Rigaku, 2018)'
_computing_structure_refinement  'SHELXL Version 2018/3 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXT Version 2018/2 (Sheldrick, 2014)'
_diffrn_ambient_temperature      125
_diffrn_detector                 'hybrid photon counting detector'
_diffrn_detector_area_resol_mean 5.811
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device       'AFC11: Eulerian 3 circle'
_diffrn_measurement_device_type  'Rigaku XtaLAB P200K'
_diffrn_measurement_method       '\w scans'
_diffrn_measurement_specimen_support Loop
_diffrn_radiation_monochromator  'Rigaku Osmic Confocal Optical System'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0391
_diffrn_reflns_av_unetI/netI     0.0286
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.983
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            13407
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.983
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         75.587
_diffrn_reflns_theta_min         3.694
_diffrn_source                   'Rotating Anode'
_diffrn_source_type              'Rigaku MM-007HF'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.113
_exptl_absorpt_correction_T_max  0.967
_exptl_absorpt_correction_T_min  0.631
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.8d (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.506
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             576.00
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: dichloromethane/diethyl ether'
_exptl_crystal_size_max          0.120
_exptl_crystal_size_mid          0.100
_exptl_crystal_size_min          0.030
_refine_diff_density_max         0.54
_refine_diff_density_min         -0.32
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     181
_refine_ls_number_reflns         2524
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0672
_refine_ls_R_factor_gt           0.0625
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.1131P)^2^+0.6636P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1818
_refine_ls_wR_factor_ref         0.1869
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2191
_reflns_number_total             2524
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            c9cc06426e2.cif
_cod_data_source_block           15
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_diffrn_radiation_probe' value 'X-ray' was changed to
'x-ray' in accordance with the
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 last updated on
2011-04-26.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7124452
_shelx_res_checksum              15100