One Ligand Fits All: Cationic Mono(amidinate) Alkyl Catalysts over the Full Size Range of the Group 3 and Lanthanide Metals
Sergio Bambirra; Marco W. Bouwkamp; Auke Meetsma; Bart Hessen; Journal of the American Chemical Society 126 (2004) 9182–9183; doi:10.1021/ja0475297

data_4112791
_publ_contact_author_address
;
      Crystal Structure Center,
      Inorganic Solid State Chemistry Laboratory
      Chemical Physics,
      Materials Science Center,
      Groningen University,
      Nijenborgh 4,
      NL-9747 AG Groningen,
      The Netherlands.
;
_publ_contact_author_email       A.Meetsma@fwn.rug.nl
_publ_contact_author_fax         '+31 50 3634441'
_publ_contact_author_name
;
    Drs. A. Meetsma
;
_publ_contact_author_phone       '+31 50 3634368'
_publ_section_title
;
 One Ligand Fits All: Cationic Mono(amidinate) Alkyl Catalysts over the
 Full Size Range of the Group 3 and Lanthanide Metals
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              9182
_journal_page_last               9183
_journal_paper_doi               10.1021/ja0475297
_journal_volume                  126
_journal_year                    2004
_chemical_compound_source        'see text'
_chemical_formula_moiety
'C51 H82 La N2 O4 Si, C24 H20 B, 0.5(C6 H12), 1.5(C4 H8 O)'
_chemical_formula_sum            'C84 H120 B La N2 O5.5 Si'
_chemical_formula_weight         1423.69
_chemical_name_systematic        ' ?'
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     heavy
_atom_sites_solution_secondary   direct
_audit_creation_date             '2004-02-06  12:43:22'
_audit_creation_method
;
  PLATON <TABLE ACC> option
  SHELXL97-2 & Manual Editing
;
_audit_update_record
;
  ?
;
_cell_angle_alpha                90
_cell_angle_beta                 117.101(1)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   51.220(3)
_cell_length_b                   14.0298(9)
_cell_length_c                   24.128(2)
_cell_measurement_reflns_used    8326
_cell_measurement_temperature    100(1)
_cell_measurement_theta_max      23.21
_cell_measurement_theta_min      2.28
_cell_volume                     15434.8(19)
_computing_cell_refinement       'SAINT, Bruker Version 6.02A, 2000'
_computing_data_collection       'SMART, Bruker Version 5.624, 2001'
_computing_data_reduction        'XPREP, Bruker Version 5.1/NT, 2000'
_computing_molecular_graphics
;
  PLUTO (Meetsma, 2003)
  PLATON (Spek, 1994)
;
_computing_publication_material  'PLATON (Spek, 1990)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution
;
  DIRDIF-99 (Beurskens et al., 1999)
   isomorphous with the Nd-compound
;
_diffrn_ambient_temperature      100(1)
_diffrn_detector_area_resol_mean '4096x4096 / 62x62 (binned 512)'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type
;
   Bruker Smart Apex
;
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_detector
;
   CCD area-detector
;
_diffrn_radiation_monochromator  'parallel mounted graphite'
_diffrn_radiation_source         'fine focus sealed Siemens Mo tube '
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1232
_diffrn_reflns_av_sigmaI/netI    0.1225
_diffrn_reflns_limit_h_max       60
_diffrn_reflns_limit_h_min       -60
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            54138
_diffrn_reflns_reduction_process
;
  Intensity data were corrected for Lorentz and polarization
   effects, decay and absorption and reduced to F~o~^2^
   using SAINT (Bruker, 2000) and SADABS (Sheldrick, 2001)
;
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         2.27
_exptl_absorpt_coefficient_mu    0.621
_exptl_absorpt_correction_T_max  0.9643
_exptl_absorpt_correction_T_min  0.7680
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(SADABS, Sheldrick, Bruker, 2000))'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.225
_exptl_crystal_description       platelet
_exptl_crystal_F_000             6064
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.06
_refine_diff_density_max         0.578
_refine_diff_density_min         -0.659
_refine_diff_density_rms         0.095
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.985
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     863
_refine_ls_number_reflns         13622
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.985
_refine_ls_R_factor_all          0.1068
_refine_ls_R_factor_gt           0.0491
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0459P)^2^+0.0P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1000
_refine_ls_wR_factor_ref         0.1178
_reflns_number_gt                8489
_reflns_number_total             13622
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            ja0475297si20040519_103315.cif
_cod_data_source_block           global
_cod_original_cell_volume        15434.9(19)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_original_formula_sum        'C84 H120 B La N2 O5.5     Si'
_cod_database_code               4112791
_vrn_publ_code_squeezed_elec     0.0
_vrn_publ_code_void_volume       329.0
_vrn_publ_code_frame_time_sec    30.0
_vrn_publ_code_meas_time_hour    18.3