Tetramethylaluminate and Tetramethylgallate Coordination in Rare-Earth Metal Half-Sandwich and Metallocene Complexes
Dietrich, H. Martin; Törnroos, Karl W.; Herdtweck, Eberhardt; Anwander, Reiner; Organometallics 28 (2009) 6739–; doi:10.1021/om9007168

data_4070319
_publ_section_title
;
 Tetramethylaluminate and Tetramethylgallate Coordination in Rare-Earth
 Metal Half-Sandwich and Metallocene Complexes
;
_journal_issue                   23
_journal_name_full               Organometallics
_journal_page_first              6739
_journal_paper_doi               10.1021/om9007168
_journal_volume                  28
_journal_year                    2009
_chemical_formula_moiety         'C48 H84 Al2 La2'
_chemical_formula_sum            'C48 H84 Al2 La2'
_chemical_formula_weight         992.94
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 92.8250(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.4447(4)
_cell_length_b                   17.4548(7)
_cell_length_c                   14.1693(6)
_cell_measurement_reflns_used    14150
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      30.07
_cell_measurement_theta_min      2.27
_cell_volume                     2580.07(18)
_computing_cell_refinement
;
Bruker (2004). SAINT, version 6.45a, Bruker AXS Inc., Madison, 
Wisconsin, USA.
;
_computing_data_collection
;
Bruker (1999). SMART, version 5.054, Bruker AXS Inc., Madison, 
Wisconsin, USA.
;
_computing_data_reduction
;
Bruker (2004). SAINT, version 6.45a, Bruker AXS Inc., Madison, 
Wisconsin, USA.
;
_computing_molecular_graphics
;
Brandenburg, K. (2007). DIAMOND. Version 3.1. Crystal Impact GbR, Bonn, 
Germany.
;
_computing_publication_material
;
Bruker AXS (2003). SHELXTL. Version 6.14. Bruker AXS Inc., Madison, 
Wisconsin, USA.
;
_computing_structure_refinement
;
Sheldrick, G. M. (2008). Acta Crystallographica, A64, 112-122.
;
_computing_structure_solution
;     
Sheldrick, G. M. (2008). Acta Crystallographica, A64, 112-122.
;
_diffrn_ambient_temperature      123(2)
_diffrn_detector_area_resol_mean '48 \um'
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker-AXS SMART 2K CCD'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0253
_diffrn_reflns_av_sigmaI/netI    0.0174
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            43274
_diffrn_reflns_theta_full        30.09
_diffrn_reflns_theta_max         30.09
_diffrn_reflns_theta_min         2.27
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 1
_diffrn_standards_interval_time  '28 h'
_diffrn_standards_number         959
_exptl_absorpt_coefficient_mu    1.695
_exptl_absorpt_correction_T_max  0.95594
_exptl_absorpt_correction_T_min  0.60996
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;
Bruker AXS (2003). SHELXTL. Version 6.14. 
Bruker AXS Inc., Madison, Wisconsin, USA. 
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.278
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'thin lath'
_exptl_crystal_F_000             1024
_exptl_crystal_size_max          0.325
_exptl_crystal_size_mid          0.225
_exptl_crystal_size_min          0.025
_refine_diff_density_max         0.520
_refine_diff_density_min         -0.357
_refine_diff_density_rms         0.065
_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     249
_refine_ls_number_reflns         7585
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.061
_refine_ls_R_factor_all          0.0261
_refine_ls_R_factor_gt           0.0179
_refine_ls_shift/su_max          0.004
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0160P)^2^+1.3546P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0403
_refine_ls_wR_factor_ref         0.0439
_reflns_number_gt                6451
_reflns_number_total             7585
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            om9007168_si_002.cif
_cod_data_source_block           compound3b
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               4070319