A practical photocatalytic strategy for radical (deuterio)difluoromethylation using imidazolium reagents.
Sun, Chao; Shen, Yinpu; Li, Heyin; Wang, Zhen; Li, Yifan; Huang, Mengjun; Zou, Zhenlei; Liu, Jing; Liu, Ao; Pan, Yi; Zhang, Weigang; Wang, Yi; Chemical science 16 (2025) 16039–16046; doi:10.1039/d5sc02691a

data_1575338
_publ_section_title
;
 A practical photocatalytic strategy for radical
 (deuterio)difluoromethylation using imidazolium reagents.
;
_journal_issue                   35
_journal_name_full               'Chemical science'
_journal_page_first              16039
_journal_page_last               16046
_journal_paper_doi               10.1039/d5sc02691a
_journal_volume                  16
_journal_year                    2025
_chemical_formula_moiety         'C15 H13 F2 N2 O2 S, C F3 O3 S'
_chemical_formula_sum            'C16 H13 F5 N2 O5 S2'
_chemical_formula_weight         472.40
_space_group_crystal_system      orthorhombic
_space_group_IT_number           33
_space_group_name_Hall           'P 2c -2n'
_space_group_name_H-M_alt        'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2025-03-06
_audit_creation_method
;
Olex2 1.5-beta
(compiled 2025.02.27 svn.r83f5de26 for OlexSys, GUI svn.r7172)
;
_audit_update_record
;
2025-03-19 deposited with the CCDC.	2025-08-06 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   15.9978(6)
_cell_length_b                   8.6598(3)
_cell_length_c                   13.6748(5)
_cell_measurement_reflns_used    9829
_cell_measurement_temperature    193.0
_cell_measurement_theta_max      27.467
_cell_measurement_theta_min      2.55
_cell_volume                     1894.48(12)
_computing_cell_refinement       'SAINT v8.37A (Bruker, 2015)'
_computing_data_reduction        'SAINT v8.37A (Bruker, 2015)'
_computing_molecular_graphics    'Olex2 1.5-beta (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5-beta (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2013/2 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2014/5 (Sheldrick, 2014)'
_diffrn_ambient_temperature      193.0
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0546
_diffrn_reflns_av_unetI/netI     0.0498
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            20734
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.484
_diffrn_reflns_theta_min         2.546
_diffrn_source_current           1.6
_diffrn_source_power             0.08
_diffrn_source_voltage           50.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.362
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6234
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'SADABS-2016/2 (Bruker,2016/2) was used for absorption correction. wR2(int) was 0.1688 before and 0.0883 after correction. The Ratio of minimum to maximum transmission is 0.8361. The \l/2 correction factor is Not present.'
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.656
_exptl_crystal_description       block
_exptl_crystal_F_000             960
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.481
_refine_diff_density_min         -0.975
_refine_diff_density_rms         0.179
_refine_ls_abs_structure_details
;
 Flack x determined using 1950 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   -0.01(3)
_refine_ls_extinction_coef       0.56(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   1.211
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     273
_refine_ls_number_reflns         4339
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.211
_refine_ls_R_factor_all          0.0572
_refine_ls_R_factor_gt           0.0563
_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^)+(0.0785P)^2^]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1136
_refine_ls_wR_factor_ref         0.1143
_reflns_Friedel_coverage         0.911
_reflns_Friedel_fraction_full    0.996
_reflns_Friedel_fraction_max     0.990
_reflns_number_gt                4211
_reflns_number_total             4339
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5sc02691a2.cif
_cod_data_source_block           t_a
_cod_depositor_comments
'Adding full bibliography for 1575337--1575338.cif.'
_cod_database_code               1575338
_shelxl_version_number           2013-2
_shelx_estimated_absorpt_t_max   0.944
_shelx_estimated_absorpt_t_min   0.931
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C16(H16)
2.b Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C5(H5), C6(H6), C11(H11), C12(H12), C13(H13), C14(H14),
 C15(H15)
2.c Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C)
;
_olex2_submission_special_instructions 'No special instructions were received'