Highly 3,4-Selective Polymerization of Isoprene with NPN Ligand Stabilized Rare-Earth Metal Bis(alkyl)s. Structures and Performances
Li, Shihui; Cui, Dongmei; Li, Danfeng; Hou, Zhaomin; Organometallics 28 (2009) 4814–; doi:10.1021/om900261n

data_4069545
_publ_section_title
;
 Highly 3,4-Selective Polymerization of Isoprene with NPN Ligand
 Stabilized Rare-Earth Metal Bis(alkyl)s. Structures and Performances
;
_journal_issue                   16
_journal_name_full               Organometallics
_journal_page_first              4814
_journal_paper_doi               10.1021/om900261n
_journal_volume                  28
_journal_year                    2009
_chemical_formula_sum            'C43 H64 Lu N2 O P Si2'
_chemical_formula_weight         887.08
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 91.028(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   13.347(6)
_cell_length_b                   17.976(8)
_cell_length_c                   18.662(8)
_cell_measurement_temperature    185(2)
_cell_volume                     4477(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      185(2)
_diffrn_measured_fraction_theta_full 0.644
_diffrn_measured_fraction_theta_max 0.644
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0216
_diffrn_reflns_av_sigmaI/netI    0.0446
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            15841
_diffrn_reflns_theta_full        26.07
_diffrn_reflns_theta_max         26.07
_diffrn_reflns_theta_min         1.57
_exptl_absorpt_coefficient_mu    2.326
_exptl_absorpt_correction_T_max  0.5682
_exptl_absorpt_correction_T_min  0.4045
_exptl_crystal_density_diffrn    1.316
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1832
_exptl_crystal_size_max          0.47
_exptl_crystal_size_mid          0.37
_exptl_crystal_size_min          0.27
_refine_diff_density_max         0.900
_refine_diff_density_min         -0.544
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.949
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     481
_refine_ls_number_reflns         5710
_refine_ls_number_restraints     32
_refine_ls_restrained_S_all      0.947
_refine_ls_R_factor_all          0.0274
_refine_ls_R_factor_gt           0.0229
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0124P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0514
_refine_ls_wR_factor_ref         0.0525
_reflns_number_gt                4925
_reflns_number_total             5710
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om900261n_si_002.cif
_cod_data_source_block           complex5
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4069545