N,N′-Bis-Silylated Lithium Aryl Amidinates: Synthesis, Characterization, and the Gradual Transition of Coordination Mode from σ Toward π Originated by Crystal Packing Interactions
Aharonovich, Sinai; Kapon, Moshe; Botoshanski, Mark; Eisen, Moris S.; Organometallics 27 (2008) 1869–; doi:10.1021/om701216p

data_4071030
_publ_section_title
;
 N,N&#x2032;-Bis-Silylated Lithium Aryl Amidinates: Synthesis,
 Characterization, and the Gradual Transition of Coordination Mode from \s
 Toward \p Originated by Crystal Packing Interactions
;
_journal_issue                   8
_journal_name_full               Organometallics
_journal_page_first              1869
_journal_paper_doi               10.1021/om701216p
_journal_volume                  27
_journal_year                    2008
_chemical_formula_sum            'C23 H47 Li N4 Si2'
_chemical_formula_weight         442.77
_chemical_name_common            Moris-74(Sinay)
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                103.46(3)
_cell_angle_beta                 108.24(3)
_cell_angle_gamma                95.06(2)
_cell_formula_units_Z            2
_cell_length_a                   10.189(2)
_cell_length_b                   11.171(2)
_cell_length_c                   14.437(3)
_cell_measurement_reflns_used    16244
_cell_measurement_temperature    230(2)
_cell_measurement_theta_max      25.36
_cell_measurement_theta_min      1.54
_cell_volume                     1494.6(6)
_computing_cell_refinement       'DENZO SMN (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius, 2001)'
_computing_data_reduction        'DENZO SMN (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'TEXSAN  (MSC, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      230(2)
_diffrn_measured_fraction_theta_full 0.969
_diffrn_measured_fraction_theta_max 0.969
_diffrn_measurement_device_type  'Nonius KappaCCD'
_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  0.0626
_diffrn_reflns_av_sigmaI/netI    0.0993
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            16244
_diffrn_reflns_theta_full        25.36
_diffrn_reflns_theta_max         25.36
_diffrn_reflns_theta_min         1.54
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    0.133
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    0.984
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cube
_exptl_crystal_F_000             488
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.264
_refine_diff_density_min         -0.261
_refine_diff_density_rms         0.038
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.957
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         5324
_refine_ls_number_restraints     2
_refine_ls_restrained_S_all      0.957
_refine_ls_R_factor_all          0.0851
_refine_ls_R_factor_gt           0.0539
_refine_ls_shift/su_max          0.014
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0996P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1489
_refine_ls_wR_factor_ref         0.1613
_reflns_number_gt                3463
_reflns_number_total             5324
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om701216p-file003.cif
_cod_data_source_block           complex3
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1494.6(5)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               4071030