2-tert-Butyl and 2-phenylphenylimido complexes of titanium(IV) and their olefin polymerisation activity
Nielson, Alastair J.; Glenny, Mark W.; Rickard, Clifton E. F.; Journal of the Chemical Society, Dalton Transactions  (2001) 232–; doi:10.1039/b008232p

data_7010363
_publ_section_title
;
 2-tert-Butyl and 2-phenylphenylimido complexes of titanium(IV) and
 their olefin polymerisation activity
;
_journal_issue                   3
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              232
_journal_paper_doi               10.1039/b008232p
_journal_year                    2001
_chemical_formula_sum            'C24 H62 Cl4 N6 Ti2'
_chemical_formula_weight         672.40
_chemical_name_systematic
; 
 tetra(t-butylamine)bis(t-butylimido)dichloro-di-\m-
chloroditatanium(IV)
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 117.7330(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   13.6191(2)
_cell_length_b                   10.4143(2)
_cell_length_c                   14.51000(10)
_cell_measurement_reflns_used    6397
_cell_measurement_temperature    203(2)
_cell_measurement_theta_max      26
_cell_measurement_theta_min      2
_cell_volume                     1821.59(5)
_computing_cell_refinement       'Siemens SMART'
_computing_data_collection       'Siemens SMART (Siemens, 1995)'
_computing_data_reduction        'Siemens SAINT  (Siemens, 1995)'
_computing_molecular_graphics    'Siemens SHELXTL (Siemens, 1994)'
_computing_publication_material  SHELXL-97
_computing_structure_refinement  'SHELXL-97 Sheldrick, (1997)'
_computing_structure_solution    'SHELXS Sheldrick, (1990)'
_diffrn_ambient_temperature      203(2)
_diffrn_measured_fraction_theta_full 0.856
_diffrn_measured_fraction_theta_max 0.856
_diffrn_measurement_device_type  'Siemens SMART'
_diffrn_measurement_method       'Area detector \w 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  0.0305
_diffrn_reflns_av_sigmaI/netI    0.0408
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            10950
_diffrn_reflns_theta_full        28.16
_diffrn_reflns_theta_max         28.16
_diffrn_reflns_theta_min         1.70
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.754
_exptl_absorpt_correction_T_max  0.9633
_exptl_absorpt_correction_T_min  0.7945
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Blessing, 1995'
_exptl_crystal_colour            Yellow
_exptl_crystal_density_diffrn    1.226
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.351
_refine_diff_density_min         -0.417
_refine_diff_density_rms         0.064
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     172
_refine_ls_number_reflns         4027
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0547
_refine_ls_R_factor_gt           0.0355
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0224P)^2^+1.4423P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0725
_refine_ls_wR_factor_ref         0.0821
_reflns_number_gt                3148
_reflns_number_total             4027
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b008232p.txt
_cod_data_source_block           '[1]'
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_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 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0224P)^2^+1.4423P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0224P)^2^+1.4423P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7010363