Multiple N−H Bond Activation: Synthesis and Reactivity of Functionalized Primary Amido Ytterbium Complexes
Pi, Chengfu; Zhang, Zhengxing; Pang, Zhen; Zhang, Jie; Luo, Jun; Chen, Zhenxia; Weng, Linhong; Zhou, Xigeng; Organometallics 26 (2007) 1934–; doi:10.1021/om061094+

data_4083676
_publ_section_title
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 Multiple N&#x2212;H Bond Activation:&#x00A0; Synthesis and Reactivity of
 Functionalized Primary Amido Ytterbium Complexes
;
_journal_issue                   8
_journal_name_full               Organometallics
_journal_page_first              1934
_journal_paper_doi               10.1021/om061094+
_journal_volume                  26
_journal_year                    2007
_chemical_formula_sum            'C42 H54 N4 O Yb2'
_chemical_formula_weight         976.97
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           45
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'I 2 -2c'
_symmetry_space_group_name_H-M   'I b a 2'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   20.310(6)
_cell_length_b                   42.705(12)
_cell_length_c                   9.543(3)
_cell_measurement_reflns_used    1021
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      22.521
_cell_measurement_theta_min      2.587
_cell_volume                     8277(4)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker 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 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       '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  0.0384
_diffrn_reflns_av_sigmaI/netI    0.0686
_diffrn_reflns_limit_h_max       24
_diffrn_reflns_limit_h_min       -24
_diffrn_reflns_limit_k_max       41
_diffrn_reflns_limit_k_min       -50
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            17105
_diffrn_reflns_theta_full        25.01
_diffrn_reflns_theta_max         25.01
_diffrn_reflns_theta_min         0.95
_diffrn_standards_decay_%        8.10
_exptl_absorpt_coefficient_mu    4.526
_exptl_absorpt_correction_T_max  0.6603
_exptl_absorpt_correction_T_min  0.4647
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_density_diffrn    1.568
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             3856
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.425
_refine_diff_density_min         -0.467
_refine_diff_density_rms         0.175
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.982
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     434
_refine_ls_number_reflns         7182
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      0.982
_refine_ls_R_factor_all          0.0688
_refine_ls_R_factor_gt           0.0392
_refine_ls_shift/su_max          0.204
_refine_ls_shift/su_mean         0.014
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0662P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1043
_refine_ls_wR_factor_ref         0.1243
_reflns_number_gt                4875
_reflns_number_total             7182
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om061094%2Bsi20061201_101034.cif
_cod_data_source_block           f60430b
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/automatic-downloads/retrospective/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_cell_volume        8278(4)
_cod_original_sg_symbol_H-M      Iba2
_cod_database_code               4083676