Low-coordinate rare-earth complexes of the asymmetric 2,4-di-tert-butylphenolate ligand prepared by redox transmetallation/protolysis reactions, and their reactivity towards ring-opening polymerisation.
Clark, Lawrence; Deacon, Glen B.; Forsyth, Craig M.; Junk, Peter C.; Mountford, Philip; Townley, Josh P.; Dalton transactions (Cambridge, England : 2003) 39 (2010) 6693–6704; doi:10.1039/c0dt00023j

data_7025849
_publ_section_title
;
 Low-coordinate rare-earth complexes of the asymmetric
 2,4-di-tert-butylphenolate ligand prepared by redox
 transmetallation/protolysis reactions, and their reactivity towards
 ring-opening polymerisation.
;
_journal_issue                   29
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              6693
_journal_page_last               6704
_journal_paper_doi               10.1039/c0dt00023j
_journal_volume                  39
_journal_year                    2010
_chemical_formula_moiety         'C56 H91 Er O6.50'
_chemical_formula_sum            'C56 H91 Er O6.5'
_chemical_formula_weight         1035.55
_chemical_name_systematic
;
?
;
_space_group_IT_number           158
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'P 3 -2"c'
_symmetry_space_group_name_H-M   'P 3 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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            6
_cell_length_a                   24.9188(2)
_cell_length_b                   24.9188(2)
_cell_length_c                   16.7294(3)
_cell_measurement_reflns_used    9992
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      29.48
_cell_measurement_theta_min      2.61
_cell_volume                     8996.33(19)
_computing_cell_refinement       'Bruker Apex2 v2.0'
_computing_data_collection       'Bruker Apex2 v2.0'
_computing_data_reduction        'Bruker Apex2 v2.0'
_computing_molecular_graphics    X-Seed
_computing_publication_material  CIFTAB
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker X8 Apex CCD'
_diffrn_measurement_method       'thin slice 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  0.0453
_diffrn_reflns_av_sigmaI/netI    0.0305
_diffrn_reflns_limit_h_max       29
_diffrn_reflns_limit_h_min       -29
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            81382
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         0.94
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.441
_exptl_absorpt_correction_T_max  0.90
_exptl_absorpt_correction_T_min  0.83
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            pink
_exptl_crystal_density_diffrn    1.147
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3282
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.07
_refine_diff_density_max         2.365
_refine_diff_density_min         -2.103
_refine_diff_density_rms         0.109
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(4)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.187
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     283
_refine_ls_number_reflns         9725
_refine_ls_number_restraints     29
_refine_ls_restrained_S_all      1.890
_refine_ls_R_factor_all          0.0760
_refine_ls_R_factor_gt           0.0703
_refine_ls_shift/su_max          0.027
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0288P)^2^+66.9155P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1387
_refine_ls_wR_factor_ref         0.1416
_reflns_number_gt                8872
_reflns_number_total             9725
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00023j.txt
_cod_data_source_block           josh05
_cod_original_cell_volume        8996.32(19)
_cod_original_sg_symbol_Hall     'P -3 c" c'
_cod_original_formula_sum        'C56 H91 Er O6.50'
_cod_database_code               7025849