Polymeric dimethylytterbium and the terminal methyl complex (Tp<sup>tBu,Me</sup>)Yb(CH<sub>3</sub>)(thf).
Katzenmayer, Markus M.; Wolf, Benjamin M.; Mortis, Alexandros; Maichle-Mössmer, Cäcilia; Anwander, Reiner; Chemical communications (Cambridge, England) 57 (2021) 243–246; doi:10.1039/d0cc06981g

data_7127459
_publ_section_title
;
 Polymeric dimethylytterbium and the terminal methyl complex
 (Tp<sup>tBu,Me</sup>)Yb(CH<sub>3</sub>)(thf).
;
_journal_issue                   2
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              243
_journal_page_last               246
_journal_paper_doi               10.1039/d0cc06981g
_journal_volume                  57
_journal_year                    2021
_chemical_formula_sum            'C24 H72 N4 Si8 Yb2'
_chemical_formula_weight         987.65
_chemical_properties_physical    Air-sensitive,Moisture-sensitive
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2020-10-20 deposited with the CCDC.	2020-11-24 downloaded from the CCDC.
;
_cell_angle_alpha                73.7690(10)
_cell_angle_beta                 86.7190(10)
_cell_angle_gamma                71.3230(10)
_cell_formula_units_Z            2
_cell_length_a                   8.8586(4)
_cell_length_b                   12.4947(6)
_cell_length_c                   21.8119(9)
_cell_measurement_reflns_used    108603
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      30.495
_cell_measurement_theta_min      2.261
_cell_volume                     2194.58(17)
_computing_cell_refinement       'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_data_collection       'APEX3 v2017.3-0 (Bruker AXS)'
_computing_data_reduction        'SAINT V8.38A (Bruker AXS Inc., 2017)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution
'XT, VERSION 2014/5,SHELXS-13 (Sheldrick 2008)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX II DUO'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0450
_diffrn_reflns_av_unetI/netI     0.0261
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.998
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       31
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            108513
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.998
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.546
_diffrn_reflns_theta_min         0.973
_diffrn_source                   'ImuS-focus sealed tube'
_exptl_absorpt_coefficient_mu    4.473
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.495
_exptl_crystal_description       needle
_exptl_crystal_F_000             992
_exptl_crystal_size_max          0.409
_exptl_crystal_size_mid          0.132
_exptl_crystal_size_min          0.106
_exptl_transmission_factor_max   0.7461
_exptl_transmission_factor_min   0.4675
_refine_diff_density_max         2.469
_refine_diff_density_min         -1.280
_refine_diff_density_rms         0.107
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     368
_refine_ls_number_reflns         13408
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0294
_refine_ls_R_factor_gt           0.0225
_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^)+(0.0164P)^2^+2.8414P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0472
_refine_ls_wR_factor_ref         0.0501
_reflns_Friedel_coverage         0.000
_reflns_number_gt                11648
_reflns_number_total             13408
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d0cc06981g2.cif
_cod_data_source_block           2_mo_MK51_0m_Cili
_cod_depositor_comments
'Adding full bibliography for 7127457--7127460.cif.'
_cod_database_code               7127459
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.262
_shelx_estimated_absorpt_t_max   0.649
_shelx_res_checksum              92406
_shelx_hkl_checksum              2686