Carbon versus Silicon Bridges. Synthesis of a New Versatile Ligand and Its Applications in Organolanthanide Chemistry
Wang, Shaowu; Yang, Qingchuan; Mak, Thomas C. W.; Xie, Zuowei; Organometallics 19 (2000) 334–; doi:10.1021/om990648o

data_4077666
_publ_section_title
;
 Carbon versus Silicon Bridges. Synthesis of a New Versatile Ligand and
 Its Applications in Organolanthanide Chemistry
;
_journal_issue                   3
_journal_name_full               Organometallics
_journal_page_first              334
_journal_paper_doi               10.1021/om990648o
_journal_volume                  19
_journal_year                    2000
_chemical_formula_sum            'C44 H52 B20 Li O4 Sm'
_chemical_formula_weight         1018.35
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
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_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                76.83(2)
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_cell_angle_gamma                85.856(16)
_cell_formula_units_Z            2
_cell_length_a                   11.994(3)
_cell_length_b                   13.266(4)
_cell_length_c                   17.716(5)
_cell_measurement_temperature    293(2)
_cell_volume                     2664.2(13)
_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      293(2)
_diffrn_measured_fraction_theta_full 0.780
_diffrn_measured_fraction_theta_max 0.780
_diffrn_measurement_device_type  'IP Rigaku'
_diffrn_measurement_method       IP
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'rptation anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
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_diffrn_reflns_av_sigmaI/netI    0.1005
_diffrn_reflns_limit_h_max       14
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_diffrn_reflns_theta_full        25.49
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_exptl_absorpt_correction_type   abscor
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.269
_exptl_crystal_density_meas      ?
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_exptl_crystal_description       plate
_exptl_crystal_F_000             1026
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.26
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_refine_diff_density_max         0.961
_refine_diff_density_min         -1.030
_refine_diff_density_rms         0.116
_refine_ls_extinction_coef       0.0000(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
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_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.013
_refine_ls_R_factor_all          0.0842
_refine_ls_R_factor_gt           0.0745
_refine_ls_shift/su_max          0.851
_refine_ls_shift/su_mean         0.032
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1592P)^2^+0.2874P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2073
_refine_ls_wR_factor_ref         0.2263
_reflns_number_gt                6843
_reflns_number_total             7737
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om990648o.cif
_cod_data_source_block           compound_5
_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      P-1
_cod_database_code               4077666