Chiral spirosiladiphosphines: ligand development and applications in Rh-catalyzed asymmetric hydrosilylation/cyclization of 1,6-enynes with enhanced reactivity.
Hou, Fei; Liu, Minjie; Ru, Tong; Tan, Zequn; Ning, Yingtang; Chen, Fen-Er; Chemical science 14 (2023) 4641–4646; doi:10.1039/d2sc06349b

data_1568716
_publ_section_title
;
 Chiral spirosiladiphosphines: ligand development and applications in
 Rh-catalyzed asymmetric hydrosilylation/cyclization of 1,6-enynes with
 enhanced reactivity.
;
_journal_issue                   17
_journal_name_full               'Chemical science'
_journal_page_first              4641
_journal_page_last               4646
_journal_paper_doi               10.1039/d2sc06349b
_journal_volume                  14
_journal_year                    2023
_chemical_formula_sum            'C40 H34 P2 Si'
_chemical_formula_weight         604.70
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2019/2
_audit_update_record
;
2022-10-17 deposited with the CCDC.	2023-03-27 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 108.620(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   11.6462(5)
_cell_length_b                   8.7260(4)
_cell_length_c                   16.7421(8)
_cell_measurement_reflns_used    1803
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      52.44
_cell_measurement_theta_min      3.02
_cell_volume                     1612.35(13)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2019/2 (Sheldrick, 2019)'
_computing_structure_solution    'SHELXT 2018/2 (Sheldrick, 2018)'
_diffrn_ambient_temperature      170(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           GaK\a
_diffrn_radiation_wavelength     1.34139
_diffrn_reflns_av_R_equivalents  0.0394
_diffrn_reflns_av_unetI/netI     0.0437
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            17268
_diffrn_reflns_point_group_measured_fraction_full 0.986
_diffrn_reflns_point_group_measured_fraction_max 0.985
_diffrn_reflns_theta_full        53.594
_diffrn_reflns_theta_max         53.898
_diffrn_reflns_theta_min         4.841
_exptl_absorpt_coefficient_mu    1.163
_exptl_absorpt_correction_T_max  0.752
_exptl_absorpt_correction_T_min  0.527
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.246
_exptl_crystal_description       block
_exptl_crystal_F_000             636
_exptl_crystal_size_max          0.100
_exptl_crystal_size_mid          0.060
_exptl_crystal_size_min          0.050
_refine_diff_density_max         0.210
_refine_diff_density_min         -0.155
_refine_diff_density_rms         0.035
_refine_ls_abs_structure_details
; 
 Flack x determined using 2308 quotients [(I+)-(I-)]/[(I+)+(I-)] 
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259). 
;
_refine_ls_abs_structure_Flack   0.071(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.035
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     388
_refine_ls_number_reflns         5819
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.035
_refine_ls_R_factor_all          0.0355
_refine_ls_R_factor_gt           0.0316
_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^)+(0.0358P)^2^+0.2717P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0751
_refine_ls_wR_factor_ref         0.0778
_reflns_Friedel_coverage         0.846
_reflns_Friedel_fraction_full    0.974
_reflns_Friedel_fraction_max     0.972
_reflns_number_gt                5435
_reflns_number_total             5819
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d2sc06349b2.cif
_cod_data_source_block           ga_221012a_a
_cod_depositor_comments
'Adding full bibliography for 1568716--1568717.cif.'
_cod_original_sg_symbol_H-M      'P 21'
_cod_database_code               1568716
_shelx_shelxl_version_number     2019/2
_shelx_estimated_absorpt_t_min   0.893
_shelx_estimated_absorpt_t_max   0.944
_shelx_res_checksum              58678