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_4069548
_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            'C38 H55 N3 O P Si2 Y'
_chemical_formula_weight         745.91
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           88
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-I 4ad'
_symmetry_space_group_name_H-M   'I 41/a :2'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   20.8486(5)
_cell_length_b                   20.8486(5)
_cell_length_c                   38.220(2)
_cell_measurement_temperature    187(2)
_cell_volume                     16612.9(10)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      187(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0914
_diffrn_reflns_av_sigmaI/netI    0.0697
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       45
_diffrn_reflns_limit_l_min       -37
_diffrn_reflns_number            43601
_diffrn_reflns_theta_full        25.13
_diffrn_reflns_theta_max         25.13
_diffrn_reflns_theta_min         1.74
_exptl_absorpt_coefficient_mu    1.531
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.193
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             6304
_exptl_crystal_size_max          0.243
_exptl_crystal_size_mid          0.169
_exptl_crystal_size_min          0.121
_refine_diff_density_max         0.351
_refine_diff_density_min         -0.233
_refine_diff_density_rms         0.066
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.007
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     424
_refine_ls_number_reflns         7421
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.007
_refine_ls_R_factor_all          0.0908
_refine_ls_R_factor_gt           0.0479
_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^)+(0.0573P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0989
_refine_ls_wR_factor_ref         0.1147
_reflns_number_gt                4882
_reflns_number_total             7421
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om900261n_si_002.cif
_cod_data_source_block           complex9b
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Tetragonal' changed to 'tetragonal'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from
2011-04-26.

'_exptl_absorpt_correction_type' value 'Multi-scan'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        16612.6(10)
_cod_original_sg_symbol_H-M      I4(1)/a
_cod_database_code               4069548