Reductive desymmetric silylation of biaryl bis(triflates) enabled by a chiral nickel/picolinamide complex.
Chen, Zhe; Zhang, Junjie; Wang, Chuan; Chemical science 17 (2026) 6710–6716; doi:10.1039/d5sc09250g

data_1576494
_publ_section_title
;
 Reductive desymmetric silylation of biaryl bis(triflates) enabled by a
 chiral nickel/picolinamide complex.
;
_journal_issue                   13
_journal_name_full               'Chemical science'
_journal_page_first              6710
_journal_page_last               6716
_journal_paper_doi               10.1039/d5sc09250g
_journal_volume                  17
_journal_year                    2026
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C29 H29 Cl N5 Ni O2, Cl'
_chemical_formula_sum            'C29 H29 Cl2 N5 Ni O2'
_chemical_formula_weight         609.18
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   mixed
_atom_sites_solution_primary     dual
_audit_creation_date             2024-09-12
_audit_creation_method
;
Olex2 1.5
(compiled 2024.02.16 svn.r378c4104 for OlexSys, GUI svn.r6928)
;
_audit_update_record
;
2025-05-19 deposited with the CCDC.	2026-02-05 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.06990(10)
_cell_length_b                   17.0862(3)
_cell_length_c                   19.4067(3)
_cell_measurement_reflns_used    9991
_cell_measurement_temperature    170.00
_cell_measurement_theta_max      54.638
_cell_measurement_theta_min      2.999
_cell_volume                     3007.46(8)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_reduction        'SAINT V8.40B (?, 2016)'
_computing_molecular_graphics    'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 1.5 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL 2018/3 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      170.00
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker D8 Venture'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           GaK\a
_diffrn_radiation_wavelength     1.34139
_diffrn_reflns_av_R_equivalents  0.0592
_diffrn_reflns_av_unetI/netI     0.0615
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            26975
_diffrn_reflns_point_group_measured_fraction_full 0.971
_diffrn_reflns_point_group_measured_fraction_max 0.971
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         54.913
_diffrn_reflns_theta_min         2.998
_diffrn_source_current           2.85
_diffrn_source_power             0.19887300000000002
_diffrn_source_voltage           69.78
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.785
_exptl_absorpt_correction_T_max  0.7508
_exptl_absorpt_correction_T_min  0.5172
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.1714 before and 0.0945 after correction.
The Ratio of minimum to maximum transmission is 0.6889.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            blue
_exptl_crystal_colour_primary    blue
_exptl_crystal_density_diffrn    1.345
_exptl_crystal_description       block
_exptl_crystal_F_000             1264
_exptl_crystal_size_max          0.17
_exptl_crystal_size_mid          0.17
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.795
_refine_diff_density_min         -0.518
_refine_diff_density_rms         0.074
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.037(7)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.091
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     358
_refine_ls_number_reflns         5561
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.091
_refine_ls_R_factor_all          0.0528
_refine_ls_R_factor_gt           0.0419
_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^)+(0.0589P)^2^+0.1680P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1053
_refine_ls_wR_factor_ref         0.1111
_reflns_Friedel_coverage         0.722
_reflns_Friedel_fraction_full    0.935
_reflns_Friedel_fraction_max     0.936
_reflns_number_gt                4805
_reflns_number_total             5561
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d5sc09250g2.cif
_cod_data_source_block           240912cz
_cod_depositor_comments
'Adding full bibliography for 1576493--1576494.cif.'
_cod_database_code               1576494
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.796
_shelx_estimated_absorpt_t_min   0.497
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 0.963(7)
 0.037(7)
2. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All O(H) groups
3.a Ternary CH refined with riding coordinates:
 C7(H7)
3.b Secondary CH2 refined with riding coordinates:
 C8(H8A,H8B)
3.c Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2A), C3(H3), C4(H4), C10(H10), C11(H11), C12(H12), C13(H13),
 C14(H14), C15(H15), C16(H16), C17(H17), C18(H18), C19(H19), C20(H20), C21(H21),
  C22(H22), C23(H23), C24(H24), C25(H25), C26(H26), C27(H27), C28(H28), C29(H29)
3.d Idealised tetrahedral OH refined as rotating group:
 O2(H2)
;
_smtbx_masks_void_probe_radius   1.2
_smtbx_masks_void_truncation_radius 1.2
_shelx_res_checksum              35234
_shelx_hkl_checksum              27687
_shelx_fab_checksum              90253
_olex2_submission_special_instructions 'No special instructions were received'