Difluorination of Furonaphthoquinones.
Li, Jie; Xue, Yu; Fan, Zhoulong; Ding, Chunyong; Zhang, Ao; The Journal of organic chemistry 82 (2017) 7388–7393; doi:10.1021/acs.joc.7b01064

data_4032614
_publ_section_title
;
 Difluorination of Furonaphthoquinones.
;
_journal_issue                   14
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              7388
_journal_page_last               7393
_journal_paper_doi               10.1021/acs.joc.7b01064
_journal_volume                  82
_journal_year                    2017
_chemical_formula_moiety         'C16 H16 F2 O4'
_chemical_formula_sum            'C16 H16 F2 O4'
_chemical_formula_weight         310.29
_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'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2017-04-10
_audit_creation_method
;
Olex2 1.2-alpha
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5335)
;
_cell_angle_alpha                90
_cell_angle_beta                 97.807(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.5298(18)
_cell_length_b                   9.348(2)
_cell_length_c                   21.330(5)
_cell_measurement_reflns_used    1634
_cell_measurement_temperature    205
_cell_measurement_theta_max      22.878
_cell_measurement_theta_min      2.38
_cell_volume                     1487.5(6)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2009)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2009)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      205
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0417
_diffrn_reflns_av_unetI/netI     0.0518
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.988
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            9837
_diffrn_reflns_point_group_measured_fraction_full 0.994
_diffrn_reflns_point_group_measured_fraction_max 0.988
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.538
_diffrn_reflns_theta_min         1.927
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.115
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6214
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2008/1 (Bruker,2008) was used for absorption correction. wR2(int) was 0.0821 before and 0.0574 after correction. The Ratio of minimum to maximum transmission is 0.8334. The \l/2 correction factor is 0.0015.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.386
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             648
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.315
_refine_diff_density_min         -0.222
_refine_diff_density_rms         0.053
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     203
_refine_ls_number_reflns         3388
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.0769
_refine_ls_R_factor_gt           0.0507
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0830P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1366
_refine_ls_wR_factor_ref         0.1560
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2344
_reflns_number_total             3388
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo7b01064_si_002.cif
_cod_data_source_block           mo_2017226-d5-0109-1_0m_cmpd_4a
_cod_depositor_comments
'Adding full bibliography for 4032614--4032617.cif.'
_cod_original_cell_volume        1487.4(6)
_cod_database_code               4032614
_shelx_shelxl_version_number     2014/7
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups, All O(H) groups
2.a Secondary CH2 refined with riding coordinates:
 C7(H7A,H7B), C8(H8A,H8B), C9(H9A,H9B)
2.b Aromatic/amide H refined with riding coordinates:
 C13(H13), C12(H12)
2.c Idealised Me refined as rotating group:
 C15(H15A,H15B,H15C), C16(H16A,H16B,H16C)
2.d Idealised tetrahedral OH refined as rotating group:
 O2(H2), O3(H3)
;
_olex2_submission_special_instructions 'No special instructions were received'