Tetramethylcyclopentadienyl vs Cyclopentadienyl Substituents. Synthesis and Structural Characterization of Organolanthanide Compounds Derived from the Versatile Ligand Me2Si(C5Me4H)(C2B10H11)
Zi, Guofu; Yang, Qingchuan; Mak, Thomas C. W.; Xie, Zuowei; Organometallics 20 (2001) 2359–; doi:10.1021/om010031i

data_4077282
_publ_section_title
;
 Tetramethylcyclopentadienyl vs Cyclopentadienyl Substituents. Synthesis
 and Structural Characterization of Organolanthanide Compounds Derived
 from the Versatile Ligand Me2Si(C5Me4H)(C2B10H11)
;
_journal_issue                   11
_journal_name_full               Organometallics
_journal_page_first              2359
_journal_paper_doi               10.1021/om010031i
_journal_volume                  20
_journal_year                    2001
_chemical_formula_sum            'C25 H58 B10 Cl2 Li O6 Si Yb'
_chemical_formula_weight         841.78
_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                 102.540(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.4780(11)
_cell_length_b                   15.1470(12)
_cell_length_c                   16.9650(11)
_cell_measurement_temperature    294(2)
_cell_volume                     4133.3(5)
_computing_cell_refinement       'BIOTEX Rigaku'
_computing_data_collection       'RAXIS Rigaku'
_computing_data_reduction        'BIOTEX Rigaku'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      294(2)
_diffrn_measured_fraction_theta_full 0.882
_diffrn_measured_fraction_theta_max 0.882
_diffrn_measurement_device_type  'IP Rigaku'
_diffrn_measurement_method       IP
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rotation anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0821
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            5729
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.85
_exptl_absorpt_coefficient_mu    2.454
_exptl_absorpt_correction_T_max  1.241
_exptl_absorpt_correction_T_min  0.785
_exptl_absorpt_correction_type   abscor
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.353
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1708
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.25
_refine_diff_density_max         0.700
_refine_diff_density_min         -0.908
_refine_diff_density_rms         0.093
_refine_ls_extinction_coef       0.00427(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.129
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         5729
_refine_ls_number_restraints     48
_refine_ls_restrained_S_all      1.148
_refine_ls_R_factor_all          0.0594
_refine_ls_R_factor_gt           0.0512
_refine_ls_shift/su_max          0.603
_refine_ls_shift/su_mean         0.033
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0532P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1396
_refine_ls_wR_factor_ref         0.1453
_reflns_number_gt                5220
_reflns_number_total             5729
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om010031i.cif
_cod_data_source_block           compound_10
_cod_depositor_comments
;
The following automatic conversions were performed:
'_atom_site_symetry_multiplicity' tag replaced with
'_atom_site_symmetry_multiplicity'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4077282