Low-valent-tungsten catalysis enables hydroboration of esters and nitriles.
Song, Heng; Xiao, Yuting; Wei, Jingjing; Liu, Yuzan; Yang, Liqing; Bai, Pengtao; Yang, Fu; Yu, Kai; Xu, Chen; Cai, Xingwei; Chemical communications (Cambridge, England) 60 (2024) 5026–5029; doi:10.1039/d4cc00041b

data_7132912
_publ_section_title
;
 Low-valent-tungsten catalysis enables hydroboration of esters and
 nitriles.
;
_journal_issue                   38
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              5026
_journal_page_last               5029
_journal_paper_doi               10.1039/d4cc00041b
_journal_volume                  60
_journal_year                    2024
_chemical_formula_moiety         'C20 H14 N2 O6 W'
_chemical_formula_sum            'C20 H14 N2 O6 W'
_chemical_formula_weight         562.18
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2023-09-25
_audit_creation_method
;
Olex2 1.5
(compiled 2022.04.07 svn.rca3783a0 for OlexSys, GUI svn.r6498)
;
_audit_update_record
;
2023-12-19 deposited with the CCDC.	2024-04-02 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 103.498(4)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   16.6532(10)
_cell_length_b                   10.7273(6)
_cell_length_c                   11.4809(7)
_cell_measurement_reflns_used    5432
_cell_measurement_temperature    300.00
_cell_measurement_theta_max      24.340
_cell_measurement_theta_min      2.728
_cell_volume                     1994.3(2)
_computing_cell_refinement       'SAINT V8.40B (?, 2016)'
_computing_data_collection       'Bruker D8 Venture diffractometer'
_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 2019/2 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      300.00
_diffrn_detector                 'CCD area detector'
_diffrn_detector_area_resol_mean 7.9
_diffrn_detector_type            'CCD area detector'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device       'three-circle diffractometer'
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0195
_diffrn_reflns_av_unetI/netI     0.0230
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9847
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.996
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.515
_diffrn_reflns_theta_min         2.516
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_current           30.0
_diffrn_source_power             1.35
_diffrn_source_target            Mo
_diffrn_source_voltage           45.0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    5.831
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6185
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016/2) was used for absorption correction.
wR2(int) was 0.0573 before and 0.0315 after correction.
The Ratio of minimum to maximum transmission is 0.8295.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.872
_exptl_crystal_description       block
_exptl_crystal_F_000             1080
_exptl_crystal_recrystallization_method
'The crystals were growth by means of evaporation of a mixture of n-hexane and toluene at RT.'
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.862
_refine_diff_density_min         -0.413
_refine_diff_density_rms         0.086
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.081
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     133
_refine_ls_number_reflns         2286
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.081
_refine_ls_R_factor_all          0.0281
_refine_ls_R_factor_gt           0.0234
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0224P)^2^+0.5741P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0441
_refine_ls_wR_factor_ref         0.0455
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2107
_reflns_number_total             2286
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4cc00041b2.cif
_cod_data_source_block           l
_cod_depositor_comments          'Adding full bibliography for 7132912.cif.'
_cod_database_code               7132912
_shelx_shelxl_version_number     2019/2
_shelx_estimated_absorpt_t_max   0.541
_shelx_estimated_absorpt_t_min   0.475
_exptl_crystal_mounting_method
'Crystals were removed from the crystallisation vial and immediately coated with polybutenes oil (CAS: 9003-29-6) on a glass slide. A suitable single crystal coated with polybutenes oil as less as possible was sealed in capillary tube filled with argon. The capillary tube with single crystal was mounted on copper pin with solid paraffin.'
_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 Aromatic/amide H refined with riding coordinates:
 C3(H3), C4(H4), C7(H7), C8(H8)
2.b Idealised Me refined as rotating group:
 C6(H6A,H6B,H6C)
;
_shelx_res_checksum              15946
_shelx_hkl_checksum              37389
_olex2_submission_special_instructions 'No special instructions were received'