Half-sandwich Ni(II) complexes bearing enantiopure bidentate NHC-carboxylate ligands: efficient catalysts for the hydrosilylative reduction of acetophenones.
Sanz-Garrido, Jorge; Martin, Avelino; González-Arellano, Camino; Flores, Juan C.; Dalton transactions (Cambridge, England : 2003) 53 (2024) 1460–1468; doi:10.1039/d3dt03739h

data_7714733
_publ_section_title
;
 Half-sandwich Ni(II) complexes bearing enantiopure bidentate
 NHC-carboxylate ligands: efficient catalysts for the hydrosilylative
 reduction of acetophenones.
;
_journal_issue                   4
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              1460
_journal_page_last               1468
_journal_paper_doi               10.1039/d3dt03739h
_journal_volume                  53
_journal_year                    2024
_chemical_absolute_configuration unk
_chemical_formula_moiety         'C36 H46 N4 Ni O4'
_chemical_formula_sum            'C36 H46 N4 Ni O4'
_chemical_formula_weight         657.48
_space_group_crystal_system      triclinic
_space_group_IT_number           1
_space_group_name_Hall           'P 1'
_space_group_name_H-M_alt        'P 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2023-10-18
_audit_creation_method
;
Olex2 1.5
(compiled 2023.08.24 svn.re1ec1418 for OlexSys, GUI svn.r6817)
;
_audit_update_record
;
2023-10-23 deposited with the CCDC.	2023-12-15 downloaded from the CCDC.
;
_cell_angle_alpha                71.267(2)
_cell_angle_beta                 81.256(2)
_cell_angle_gamma                77.531(2)
_cell_formula_units_Z            1
_cell_length_a                   7.9269(4)
_cell_length_b                   10.0993(5)
_cell_length_c                   11.2121(5)
_cell_measurement_reflns_used    9972
_cell_measurement_temperature    200.00
_cell_measurement_theta_max      27.497
_cell_measurement_theta_min      2.429
_cell_volume                     826.67(7)
_computing_cell_refinement       'SAINT V8.40B (Bruker, 2019)'
_computing_data_collection       'Apex3 v2019.11-0 (Bruker, 2019)'
_computing_data_reduction        'SAINT V8.40B (Bruker, 2019)'
_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, 2018), 
;
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      200.00
_diffrn_detector_area_resol_mean 7.4074
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type
;
Bruker AXS D8 Venture diffractometer with PhotonIII_C14 charge-integrating and 
photon counting pixel array detector
;
_diffrn_measurement_method       'omega and phi scans'
_diffrn_radiation_collimation    'focusing mirrors'
_diffrn_radiation_monochromator  'multilayer mirror optics'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0471
_diffrn_reflns_av_unetI/netI     0.0364
_diffrn_reflns_Laue_measured_fraction_full 0.994
_diffrn_reflns_Laue_measured_fraction_max 0.995
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            42919
_diffrn_reflns_point_group_measured_fraction_full 0.991
_diffrn_reflns_point_group_measured_fraction_max 0.991
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         27.511
_diffrn_reflns_theta_min         3.300
_diffrn_source                   'microfocus sealed tube'
_diffrn_source_current           1.4
_diffrn_source_power             0.07
_diffrn_source_type              'INCOATEC I\ms 3.0'
_diffrn_source_voltage           50.0
_exptl_absorpt_coefficient_mu    0.632
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.7080
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2016/2 (Bruker,2016) was used for absorption correction.
wR2(int) was 0.0926 before and 0.0664 after correction.
The Ratio of minimum to maximum transmission is 0.9496.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            yellow
_exptl_crystal_colour_primary    yellow
_exptl_crystal_density_diffrn    1.321
_exptl_crystal_description       prism
_exptl_crystal_F_000             350
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.205
_exptl_crystal_size_min          0.078
_refine_diff_density_max         0.252
_refine_diff_density_min         -0.209
_refine_diff_density_rms         0.040
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   0.025(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     417
_refine_ls_number_reflns         7558
_refine_ls_number_restraints     3
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0331
_refine_ls_R_factor_gt           0.0297
_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^)+(0.0293P)^2^+0.2160P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0668
_refine_ls_wR_factor_ref         0.0683
_reflns_Friedel_coverage         0.992
_reflns_Friedel_fraction_full    0.988
_reflns_Friedel_fraction_max     0.987
_reflns_number_gt                7168
_reflns_number_total             7558
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d3dt03739h2.cif
_cod_data_source_block           jcf_ile2ni_0m_b
_cod_depositor_comments
'Adding full bibliography for 7714726--7714736.cif.'
_cod_database_code               7714733
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.952
_shelx_estimated_absorpt_t_min   0.863
_olex2_refinement_description
;
1. Twinned data refinement
 Scales: 0.975(12)
 0.025(12)
2. 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
3.a Ternary CH refined with riding coordinates:
 C4(H4), C5(H5), C24(H24), C25(H25)
3.b Secondary CH2 refined with riding coordinates:
 C6(H6A,H6B), C26(H26A,H26B)
3.c Aromatic/amide H refined with riding coordinates:
 C2(H2), C3(H3), C12(H12), C14(H14), C22(H22), C23(H23), C32(H32), C34(H34)
3.d Idealised Me refined as rotating group:
 C7(H7A,H7B,H7C), C8(H8A,H8B,H8C), C16(H16A,H16B,H16C), C17(H17A,H17B,H17C),
 C18(H18A,H18B,H18C), C27(H27A,H27B,H27C), C28(H28A,H28B,H28C), C36(H36A,H36B,
 H36C), C37(H37A,H37B,H37C), C38(H38A,H38B,H38C)
;
_shelx_res_checksum              7283
_shelx_hkl_checksum              42329
_olex2_submission_special_instructions 'No special instructions were received'