Zirconium complexes of bipyrrolidine derived salan ligands for the isoselective polymerisation of rac-lactide
Matthew D. Jones; Stuart L. Hancock; Paul McKeown; Pascal M. Schafer; Antoine Buchard; Lynne H. Thomas; Mary F. Mahon; John P. Lowe; Chem.Commun. 50 (2014) 15967–; doi:10.1039/C4cc07871C

data_7116133
_publ_section_title
;
 Zirconium complexes of bipyrrolidine derived salan ligands for the
 isoselective polymerisation of rac-lactide
;
_journal_name_full               Chem.Commun.
_journal_page_first              15967
_journal_paper_doi               10.1039/C4cc07871C
_journal_volume                  50
_journal_year                    2014
_chemical_formula_sum            'C32 H48 N2 O4 Zr'
_chemical_formula_weight         615.94
_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
_audit_creation_date             2014-09-30T17:10:35-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 101.392(4)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   14.1370(6)
_cell_length_b                   13.4859(5)
_cell_length_c                   16.7232(7)
_cell_measurement_temperature    150(2)
_cell_volume                     3125.5(2)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.33 (release 27-03-2014 CrysAlis171 .NET)
(compiled Mar 27 2014,17:12:48)
;
_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.33 (release 27-03-2014 CrysAlis171 .NET)
(compiled Mar 27 2014,17:12:48)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.33 (release 27-03-2014 CrysAlis171 .NET)
(compiled Mar 27 2014,17:12:48)
;
_computing_structure_refinement  'SHELXL-2013 (Sheldrick, 2013)'
_diffrn_ambient_temperature      150(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 8.1150
_diffrn_detector_type            EosS2
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.976
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, EosS2'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0763
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.976
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            13198
_diffrn_reflns_point_group_measured_fraction_full 0.997
_diffrn_reflns_point_group_measured_fraction_max 0.976
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         71.752
_diffrn_reflns_theta_min         4.575
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    3.170
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.64937
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.33 (release 27-03-2014 CrysAlis171 .NET)
(compiled Mar 27 2014,17:12:48)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            'clear light colourless'
_exptl_crystal_density_diffrn    1.309
_exptl_crystal_description       needle
_exptl_crystal_F_000             1304
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.05
_refine_diff_density_max         2.061
_refine_diff_density_min         -1.699
_refine_diff_density_rms         0.175
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.03
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     420
_refine_ls_number_reflns         5987
_refine_ls_number_restraints     30
_refine_ls_restrained_S_all      1.034
_refine_ls_R_factor_all          0.0982
_refine_ls_R_factor_gt           0.0845
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1599P)^2^+2.7233P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.2368
_reflns_number_gt                4878
_reflns_number_total             5987
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c4cc07871c2.cif
_cod_data_source_block           Zr(3)(OiPr)2
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7116133