Crystallographic characterisation of Ti(iv) piperazine complexes and their exploitation for the ring opening polymerisation of rac-lactide.
Hancock, Stuart L.; Mahon, Mary F.; Jones, Matthew D.; Dalton transactions (Cambridge, England : 2003) 40 (2011) 2033–2037; doi:10.1039/c0dt01542c

data_7015020
_publ_section_title
;
 Crystallographic characterisation of Ti(iv) piperazine complexes and
 their exploitation for the ring opening polymerisation of rac-lactide.
;
_journal_issue                   9
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              2033
_journal_page_last               2037
_journal_paper_doi               10.1039/c0dt01542c
_journal_volume                  40
_journal_year                    2011
_chemical_formula_sum            'C59 H91 N4 O8 Ti2'
_chemical_formula_weight         1080.16
_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
_cell_angle_beta                 96.782(3)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   23.224(6)
_cell_length_b                   16.478(5)
_cell_length_c                   31.844(9)
_cell_measurement_reflns_used    102329
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.17
_cell_measurement_theta_min      2.83
_cell_volume                     12101(6)
_computing_cell_refinement
;
CrystalClear-SM Expert 2.0 r4 (Rigaku, 2009)
;
_computing_data_collection
;
CrystalClear-SM Expert 2.0 r4 (Rigaku, 2009)
;
_computing_data_reduction
;
CrystalClear-SM Expert 2.0 r4 (Rigaku, 2009)
;
_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    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.982
_diffrn_measured_fraction_theta_max 0.982
_diffrn_measurement_device_type  Synchrotron
_diffrn_measurement_method       'profile data from \w-scans'
_diffrn_radiation_monochromator  Synchrotron
_diffrn_radiation_type           Synchrotron
_diffrn_radiation_wavelength     0.68890
_diffrn_reflns_av_R_equivalents  0.0710
_diffrn_reflns_av_sigmaI/netI    0.0531
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -39
_diffrn_reflns_number            102329
_diffrn_reflns_theta_full        25.17
_diffrn_reflns_theta_max         25.17
_diffrn_reflns_theta_min         2.83
_diffrn_source                   Synchrotron
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.317
_exptl_absorpt_correction_T_max  0.9934
_exptl_absorpt_correction_T_min  0.9739
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.186
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             4648
_exptl_crystal_size_max          0.08
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.02
_refine_diff_density_max         0.644
_refine_diff_density_min         -0.472
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.061
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1365
_refine_ls_number_reflns         23430
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.1017
_refine_ls_R_factor_gt           0.0727
_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^)+(0.0916P)^2^+8.8799P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1800
_refine_ls_wR_factor_ref         0.2005
_reflns_number_gt                17178
_reflns_number_total             23430
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            C0DT01542C.TXT
_cod_data_source_block           Ti2(1)2OiPr)4
_cod_depositor_comments
;
The following automatic conversions were performed:
'_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 1555 2011-01-17 13:19:09Z saulius 
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_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7015020