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_7025845
_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         'C54 H87 La O6'
_chemical_formula_sum            'C54 H87 La O6'
_chemical_formula_weight         971.15
_chemical_name_systematic
;
?
;
_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                 93.23(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   19.616(4)
_cell_length_b                   28.198(6)
_cell_length_c                   19.521(4)
_cell_measurement_reflns_used    19604
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      28.28
_cell_measurement_theta_min      0.41
_cell_volume                     10781(4)
_computing_cell_refinement       DENZO-SMN
_computing_data_collection       COLLECT
_computing_data_reduction        'DENZO-SMN and Scalepack'
_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 0.781
_diffrn_measured_fraction_theta_max 0.781
_diffrn_measurement_device_type  'Nonius KAPPA 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  0.0679
_diffrn_reflns_av_sigmaI/netI    0.0705
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -32
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            27592
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.27
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.836
_exptl_absorpt_correction_T_max  0.93
_exptl_absorpt_correction_T_min  0.75
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SORTAV
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.197
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             4128
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.08
_refine_diff_density_max         1.324
_refine_diff_density_min         -1.478
_refine_diff_density_rms         0.112
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.026
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     1176
_refine_ls_number_reflns         14832
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.026
_refine_ls_R_factor_all          0.0702
_refine_ls_R_factor_gt           0.0519
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0903P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1311
_refine_ls_wR_factor_ref         0.1421
_reflns_number_gt                11587
_reflns_number_total             14832
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c0dt00023j.txt
_cod_data_source_block           josh01
_cod_original_cell_volume        10780(4)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7025845