Rare earth metal bisamido complexes with a NNO tridentate ligand and catalytic activity for selective polymerization of isoprene
Gu, Xiaoxia; Wang, Shaowu; Wei, Yun; Zhu, Xiancui; Zhou, Shuangliu; Huang, Zeming; Mu, Xiaolong; New J. Chem. 41 (2017) 7723–7728; doi:10.1039/C7NJ01454F

data_7056355
_publ_section_title
;
 Rare earth metal bisamido complexes with a NNO tridentate ligand and
 catalytic activity for selective polymerization of isoprene
;
_journal_issue                   15
_journal_name_full               'New J. Chem.'
_journal_page_first              7723
_journal_page_last               7728
_journal_paper_doi               10.1039/C7NJ01454F
_journal_volume                  41
_journal_year                    2017
_chemical_formula_moiety         'C24 H51 N4 O Si4 Sm'
_chemical_formula_sum            'C24 H51 N4 O Si4 Sm'
_chemical_formula_weight         674.39
_space_group_crystal_system      monoclinic
_space_group_IT_number           14
_space_group_name_Hall           '-P 2yn'
_space_group_name_H-M_alt        'P 1 21/n 1'
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_audit_creation_date             2017-06-15
_audit_creation_method
;
Olex2 1.2
(compiled 2017.03.28 svn.r3405 for OlexSys, GUI svn.r5337)
;
_audit_update_record
;
2017-06-17 deposited with the CCDC.
2017-06-22 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 102.4170(10)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   12.7324(9)
_cell_length_b                   16.9061(11)
_cell_length_c                   16.9308(12)
_cell_measurement_reflns_used    9804
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.54
_cell_measurement_theta_min      2.41
_cell_volume                     3559.2(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293.15
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0259
_diffrn_reflns_av_unetI/netI     0.0183
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 0.985
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            39955
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.985
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.547
_diffrn_reflns_theta_min         1.723
_exptl_absorpt_coefficient_mu    1.805
_exptl_absorpt_correction_T_max  0.7031
_exptl_absorpt_correction_T_min  0.6816
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick,2014)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.259
_exptl_crystal_description       block
_exptl_crystal_F_000             1396
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.21
_refine_diff_density_max         1.124
_refine_diff_density_min         -1.093
_refine_diff_density_rms         0.059
_refine_ls_extinction_coef       0.00534(14)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/8 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.009
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     362
_refine_ls_number_reflns         8088
_refine_ls_number_restraints     120
_refine_ls_restrained_S_all      1.009
_refine_ls_R_factor_all          0.0363
_refine_ls_R_factor_gt           0.0280
_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^)+(0.0200P)^2^+3.8000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0616
_refine_ls_wR_factor_ref         0.0671
_reflns_Friedel_coverage         0.000
_reflns_number_gt                6853
_reflns_number_total             8088
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c7nj01454f2.cif
_cod_data_source_block           3_0m
_cod_database_code               7056355
_shelx_shelxl_version_number     2014/8
_shelx_estimated_absorpt_t_max   0.703
_shelx_estimated_absorpt_t_min   0.682
_olex2_refinement_description
;
1. 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
2. Uiso/Uaniso restraints and constraints
Si2 \\sim Si2B: within 3.8A with sigma of 0.02 and sigma for terminal atoms of
0.04
C16 \\sim C17 \\sim C18 \\sim C16 \\sim C17 \\sim C18 \\sim Si2B \\sim C16B
\\sim C17B \\sim C18B: within 3.8A with sigma of 0.02 and sigma for terminal
atoms of 0.04
3. Others
 Sof(Si2B)=Sof(C16B)=Sof(H16D)=Sof(H16E)=Sof(H16F)=Sof(C17B)=Sof(H17D)=
 Sof(H17E)=Sof(H17F)=Sof(C18B)=Sof(H18D)=Sof(H18E)=Sof(H18F)=1-FVAR(1)
 Sof(Si2)=Sof(C16)=Sof(H16A)=Sof(H16B)=Sof(H16C)=Sof(C17)=Sof(H17A)=Sof(H17B)=
 Sof(H17C)=Sof(C18)=Sof(H18A)=Sof(H18B)=Sof(H18C)=FVAR(1)
4.a Secondary CH2 refined with riding coordinates:
 C6(H6A,H6B), C7(H7A,H7B)
4.b Aromatic/amide H refined with riding coordinates:
 C1(H1), C2(H2), C3(H3), C4(H4), C10(H10)
4.c Idealised Me refined as rotating group:
 C8(H8A,H8B,H8C), C12(H12A,H12B,H12C), C13(H13A,H13B,H13C), C14(H14A,H14B,
 H14C), C15(H15A,H15B,H15C), C19(H19A,H19B,H19C), C20(H20A,H20B,H20C), C21(H21A,
 H21B,H21C), C22(H22A,H22B,H22C), C23(H23A,H23B,H23C), C24(H24A,H24B,H24C),
 C16(H16A,H16B,H16C), C17(H17A,H17B,H17C), C18(H18A,H18B,H18C), C16B(H16D,H16E,
 H16F), C17B(H17D,H17E,H17F), C18B(H18D,H18E,H18F)
;
_shelx_res_checksum              93525
_olex2_submission_special_instructions 'No special instructions were received'