Bis(alkyl) rare-earth complexes coordinated by bulky tridentate amidinate ligands bearing pendant Ph2P[double bond, length as m-dash]O and Ph2P[double bond, length as m-dash]NR groups. Synthesis, structures and catalytic activity in stereospecific isoprene polymerization.
Rad'kova, Natalia Yu; Tolpygin, Aleksei O.; Rad'kov, Vasily Yu; Khamaletdinova, Nadia M.; Cherkasov, Anton V.; Fukin, Georgi K.; Trifonov, Alexander A.; Dalton transactions (Cambridge, England : 2003) 45 (2016) 18572–18584; doi:10.1039/c6dt03074b

data_7040884
_publ_section_title
;
 Bis(alkyl) rare-earth complexes coordinated by bulky tridentate amidinate
 ligands bearing pendant Ph2P[double bond, length as m-dash]O and
 Ph2P[double bond, length as m-dash]NR groups. Synthesis, structures and
 catalytic activity in stereospecific isoprene polymerization.
;
_journal_issue                   46
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              18572
_journal_page_last               18584
_journal_paper_doi               10.1039/c6dt03074b
_journal_volume                  45
_journal_year                    2016
_chemical_formula_moiety         'C43 H62 Er N2 O P Si2, C7 H8'
_chemical_formula_sum            'C50 H70 Er N2 O P Si2'
_chemical_formula_weight         969.49
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-07-12 deposited with the CCDC.
2016-10-13 downloaded from the CCDC.
;
_cell_angle_alpha                107.3635(12)
_cell_angle_beta                 90.2711(10)
_cell_angle_gamma                115.7358(12)
_cell_formula_units_Z            2
_cell_length_a                   12.02608(14)
_cell_length_b                   12.31192(17)
_cell_length_c                   19.7345(3)
_cell_measurement_reflns_used    23505
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      32.4230
_cell_measurement_theta_min      3.3760
_cell_volume                     2481.34(7)
_computing_cell_refinement       'CrysAlis PRO'
_computing_data_collection       'CrysAlis PRO'
_computing_data_reduction        'CrysAlis PRO'
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  SHELXL-2014/7
_computing_structure_solution    SHELXT-2014/4
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Xcalibur, EOS (CCD)'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0380
_diffrn_reflns_av_unetI/netI     0.0369
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.999
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       27
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            50074
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.999
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         30.000
_diffrn_reflns_theta_min         3.118
_diffrn_source                   'fine focus sealed tube'
_exptl_absorpt_coefficient_mu    1.807
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.7832
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies, Version 1.171.37.35.
Empirical absorption correction using spherical harmonics, implemented
in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.298
_exptl_crystal_description       prism
_exptl_crystal_F_000             1006
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.200
_exptl_crystal_size_min          0.200
_refine_diff_density_max         0.968
_refine_diff_density_min         -1.049
_refine_diff_density_rms         0.083
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     528
_refine_ls_number_reflns         14458
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0285
_refine_ls_R_factor_gt           0.0241
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0266P)^2^+0.2259P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0570
_refine_ls_wR_factor_ref         0.0590
_reflns_Friedel_coverage         0.000
_reflns_number_gt                13217
_reflns_number_total             14458
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6dt03074b2.cif
_cod_data_source_block           eramsipo1
_cod_depositor_comments
'Adding full bibliography for 7040883--7040887.cif.'
_cod_original_cell_volume        2481.33(6)
_cod_database_code               7040884
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.613
_shelx_estimated_absorpt_t_max   0.714
_shelx_res_checksum              19979