Synthesis and characterization of 2-t-butylimino-functionalized indolyl rare-earth metal amido complexes for the catalytic addition of terminal alkynes to carbodiimides: the dimeric complexes with the alkynide species in the μ-η<sup>1</sup>:η<sup>2</sup> bonding modes.
Feng, Zhijun; Huang, Zeming; Wang, Shaowu; Wei, Yun; Zhou, Shuangliu; Zhu, Xiancui; Dalton transactions (Cambridge, England : 2003) 48 (2019) 11094–11102; doi:10.1039/c9dt01582e

data_7700314
_publ_section_title
;
 Synthesis and characterization of 2-t-butylimino-functionalized indolyl
 rare-earth metal amido complexes for the catalytic addition of terminal
 alkynes to carbodiimides: the dimeric complexes with the alkynide species
 in the \m-\h<sup>1</sup>:\h<sup>2</sup> bonding modes.
;
_journal_issue                   29
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              11094
_journal_page_last               11102
_journal_paper_doi               10.1039/c9dt01582e
_journal_volume                  48
_journal_year                    2019
_chemical_formula_moiety         'C25 H51 Er N4 Si4'
_chemical_formula_sum            'C25 H51 Er N4 Si4'
_chemical_formula_weight         687.31
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2019-02-10
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_audit_update_record
;
2019-02-10 deposited with the CCDC.    2019-06-18 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 109.1190(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   18.1565(16)
_cell_length_b                   11.6742(10)
_cell_length_c                   17.3053(15)
_cell_measurement_reflns_used    9879
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.639
_cell_measurement_theta_min      2.383
_cell_volume                     3465.7(5)
_computing_cell_refinement       'SAINT v7.34A (Bruker, 200?)'
_computing_data_collection       'SAINT v7.34A (Bruker, 200?)'
_computing_data_reduction        'SAINT v7.34A (Bruker, 200?)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293.15
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0326
_diffrn_reflns_av_unetI/netI     0.0295
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.994
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            29320
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.994
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.679
_diffrn_reflns_theta_min         2.110
_exptl_absorpt_coefficient_mu    2.578
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            pink
_exptl_crystal_colour_primary    pink
_exptl_crystal_density_diffrn    1.317
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1412
_exptl_crystal_size_max          0.17
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.755
_refine_diff_density_min         -1.232
_refine_diff_density_rms         0.099
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     322
_refine_ls_number_reflns         8062
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.032
_refine_ls_R_factor_all          0.0356
_refine_ls_R_factor_gt           0.0285
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0352P)^2^+2.0554P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0700
_refine_ls_wR_factor_ref         0.0744
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6944
_reflns_number_total             8062
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c9dt01582e2.cif
_cod_data_source_block           111213a
_cod_depositor_comments
'Adding full bibliography for 7700314--7700321.cif.'
_cod_database_code               7700314
_shelx_shelxl_version_number     2018/3
_shelx_estimated_absorpt_t_max   0.714
_shelx_estimated_absorpt_t_min   0.668
_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. Uiso/Uaniso restraints and constraints
Uanis(C13) \\sim Ueq: with sigma of 0.01 and sigma for terminal atoms of 0.02
3.a Aromatic/amide H refined with riding coordinates:
 C2(H2), C4(H4), C5(H5), C6(H6), C7(H7), C9(H9)
3.b Idealised Me refined as rotating group:
 C11(H11A,H11B,H11C), C12(H12A,H12B,H12C), C13(H13A,H13B,H13C), C14(H14A,H14B,
 H14C), C15(H15A,H15B,H15C), C16(H16A,H16B,H16C), C17(H17A,H17B,H17C), C18(H18A,
 H18B,H18C), C19(H19A,H19B,H19C), C20(H20A,H20B,H20C), C21(H21A,H21B,H21C),
 C22(H22A,H22B,H22C), C23(H23A,H23B,H23C), C24(H24A,H24B,H24C), C25(H25A,H25B,
 H25C)
;
_shelx_res_checksum              16009
_olex2_submission_special_instructions 'No special instructions were received'