Activation of Tantalocene(V) Alkyl and Alkylidene Complexes with Strong Organo Lewis Acids and Application to Polymerization Catalysis
Mariott, Wesley R.; Gustafson, Laura O.; Chen, Eugene Y.-X.; Organometallics 25 (2006) 3721–; doi:10.1021/om060258j

data_4075373
_publ_section_title
;
 Activation of Tantalocene(V) Alkyl and Alkylidene Complexes with Strong
 Organo Lewis Acids and Application to Polymerization Catalysis
;
_journal_issue                   15
_journal_name_full               Organometallics
_journal_page_first              3721
_journal_paper_doi               10.1021/om060258j
_journal_volume                  25
_journal_year                    2006
_chemical_formula_sum            'C32 H21 B Cl2 F15 Ta'
_chemical_formula_weight         953.15
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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            4
_cell_length_a                   12.6003(10)
_cell_length_b                   15.4046(12)
_cell_length_c                   16.4304(13)
_cell_measurement_reflns_used    6448
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      28.19
_cell_measurement_theta_min      2.43
_cell_volume                     3189.2(4)
_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  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_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  0.0328
_diffrn_reflns_av_sigmaI/netI    0.0442
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            30175
_diffrn_reflns_theta_full        28.44
_diffrn_reflns_theta_max         28.44
_diffrn_reflns_theta_min         1.81
_exptl_absorpt_coefficient_mu    3.727
_exptl_absorpt_correction_T_max  0.7547
_exptl_absorpt_correction_T_min  0.4010
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, Sheldrick, 1997'
_exptl_crystal_colour            clear
_exptl_crystal_density_diffrn    1.985
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             1840
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.311
_refine_diff_density_min         -0.583
_refine_diff_density_rms         0.097
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.013(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     460
_refine_ls_number_reflns         7807
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0280
_refine_ls_R_factor_gt           0.0236
_refine_ls_shift/su_max          0.006
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0132P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0495
_refine_ls_wR_factor_ref         0.0509
_reflns_number_gt                7246
_reflns_number_total             7807
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om060258jsi20060322_021635.cif
_cod_data_source_block           complex_1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not_measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)2(1)2(1)
_cod_database_code               4075373