Synthesis and X-ray structures of new titanium(IV) aryloxides and their exploitation for the ring opening polymerization of epsilon-caprolactone.
Davidson, Matthew G.; Jones, Matthew D.; Lunn, Matthew D.; Mahon, Mary F.; Inorganic chemistry 45 (2006) 2282–2287; doi:10.1021/ic051708n

data_4340231
_publ_section_title
;
 Synthesis and X-ray structures of new titanium(IV) aryloxides and their
 exploitation for the ring opening polymerization of epsilon-caprolactone.
;
_journal_issue                   5
_journal_name_full               'Inorganic chemistry'
_journal_page_first              2282
_journal_page_last               2287
_journal_paper_doi               10.1021/ic051708n
_journal_volume                  45
_journal_year                    2006
_chemical_formula_moiety         'C32 H56 O10 Ti2'
_chemical_formula_sum            'C32 H56 O10 Ti2'
_chemical_formula_weight         696.57
_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                 95.881(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.1990(6)
_cell_length_b                   17.9010(11)
_cell_length_c                   12.5650(10)
_cell_measurement_reflns_used    7987
_cell_measurement_temperature    170(2)
_cell_measurement_theta_max      22.47
_cell_measurement_theta_min      5.20
_cell_volume                     1834.5(2)
_computing_cell_refinement       'HKL Scalepack (Otwinski & Minor, 1997)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction        'HKL Denzo & Scalepack (Otwinski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution
; 
 SIR97- Altomare A., Burla M.C., Camalli M., Cascarano G.L., Giacovazzo C. , 
 Guagliardi A., Moliterni A.G.G., Polidori G.,Spagna R. 
 (1999) J. Appl. Cryst. 32, 115-119.
;
_diffrn_ambient_temperature      170(2)
_diffrn_measured_fraction_theta_full 0.962
_diffrn_measured_fraction_theta_max 0.962
_diffrn_measurement_device_type  'nonius kappa CCD'
_diffrn_measurement_method       CCD
_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  0.0549
_diffrn_reflns_av_sigmaI/netI    0.0490
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            7987
_diffrn_reflns_theta_full        22.47
_diffrn_reflns_theta_max         22.47
_diffrn_reflns_theta_min         5.20
_exptl_absorpt_coefficient_mu    0.485
_exptl_absorpt_correction_T_max  0.9178
_exptl_absorpt_correction_T_min  0.8603
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.261
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         0.464
_refine_diff_density_min         -0.331
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     210
_refine_ls_number_reflns         2302
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0717
_refine_ls_R_factor_gt           0.0524
_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^)+(0.0574P)^2^+2.5185P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1250
_refine_ls_wR_factor_ref         0.1410
_reflns_number_gt                1795
_reflns_number_total             2302
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic051708nsi20051004_093209.cif
_cod_data_source_block           2a
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               4340231