Pentamethylcyclopentadienyl-substituted hypersilylsilylene: reversible and irreversible activation of C[double bond, length as m-dash]C double bonds and dihydrogen.
Leszczyńska, Kinga I; Deglmann, Peter; Präsang, Carsten; Huch, Volker; Zimmer, Michael; Schweinfurth, David; Scheschkewitz, David; Dalton transactions (Cambridge, England : 2003) 49 (2020) 13218–13225; doi:10.1039/d0dt02943b

data_7705319
_publ_section_title
;
 Pentamethylcyclopentadienyl-substituted hypersilylsilylene: reversible
 and irreversible activation of C[double bond, length as m-dash]C double
 bonds and dihydrogen.
;
_journal_issue                   38
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              13218
_journal_page_last               13225
_journal_paper_doi               10.1039/d0dt02943b
_journal_volume                  49
_journal_year                    2020
_chemical_formula_moiety         'C21 H46 Si5'
_chemical_formula_sum            'C21 H46 Si5'
_chemical_formula_weight         439.03
_chemical_properties_physical    Air-sensitive,Moisture-sensitive
_space_group_crystal_system      monoclinic
_space_group_IT_number           11
_space_group_name_Hall           '-P 2yb'
_space_group_name_H-M_alt        'P 1 21/m 1'
_atom_sites_solution_hydrogens   difmap
_audit_creation_method           SHELXL-2014/6
_audit_update_record
;
2020-05-07 deposited with the CCDC.	2020-08-28 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 103.274(2)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   9.5450(4)
_cell_length_b                   14.1726(6)
_cell_length_c                   10.4229(4)
_cell_measurement_reflns_used    9956
_cell_measurement_temperature    142(2)
_cell_measurement_theta_max      34.14
_cell_measurement_theta_min      2.47
_cell_volume                     1372.31(10)
_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-2014/6 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      142(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.990
_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  0.0205
_diffrn_reflns_av_unetI/netI     0.0198
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.990
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            22047
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.990
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         34.279
_diffrn_reflns_theta_min         2.008
_exptl_absorpt_coefficient_mu    0.265
_exptl_absorpt_correction_T_max  0.7467
_exptl_absorpt_correction_T_min  0.7229
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
 SADABS 2016/2: Krause, L., Herbst-Irmer, R., Sheldrick G.M. & Stalke D., 
 J. Appl. Cryst. 48 (2015) 3-10 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.062
_exptl_crystal_description       block
_exptl_crystal_F_000             484
_exptl_crystal_recrystallization_method 'Re-crystallisation from solvent'
_exptl_crystal_size_max          0.449
_exptl_crystal_size_mid          0.341
_exptl_crystal_size_min          0.210
_refine_diff_density_max         0.453
_refine_diff_density_min         -0.253
_refine_diff_density_rms         0.044
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     221
_refine_ls_number_reflns         5843
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0349
_refine_ls_R_factor_gt           0.0269
_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^)+(0.0407P)^2^+0.1850P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0744
_refine_ls_wR_factor_ref         0.0790
_reflns_Friedel_coverage         0.000
_reflns_number_gt                4978
_reflns_number_total             5843
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0dt02943b2.cif
_cod_data_source_block           sh4047
_cod_depositor_comments
'Adding full bibliography for 7705318--7705321.cif.'
_cod_original_sg_symbol_H-M      'P 21/m'
_cod_database_code               7705319
_shelx_estimated_absorpt_t_min   0.890
_shelx_estimated_absorpt_t_max   0.946
_shelxl_version_number           2014/6
_shelx_res_checksum              97339