Synthesis and structures of lithium N-trimethylsilyl- and -neopentyl-anilides and their Et2O and tmen adducts; crystal structures of [(Li{μ-N(Ph)R}-trans)2(μ-tmen)]∞ (R = SiMe3 1 or CH2But 2) and [Li{μ-N(Ph)CH2But}(OEt2)]2 †
Bezombes, Jean Philippe; Hitchcock, Peter B.; Lappert, Michael F.; Merle, Philippe G.; Journal of the Chemical Society, Dalton Transactions  (2001) 816–; doi:10.1039/b009724l

data_7010491
_publ_section_title
;
 Synthesis and structures of lithium N-trimethylsilyl- and
 -neopentyl-anilides and their Et2O and tmen adducts; crystal
 structures of [(Li{\m-N(Ph)R}-trans)2(\m-tmen)]\\infty
 (R&#x2005;=&#x2005;SiMe3 1 or CH2But 2) and
 [Li{\m-N(Ph)CH2But}(OEt2)]2&#x200A;&#x2020;
;
_journal_issue                   6
_journal_name_full
'Journal of the Chemical Society, Dalton Transactions'
_journal_page_first              816
_journal_paper_doi               10.1039/b009724l
_journal_year                    2001
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C24 H44 Li2 N4 Si2'
_chemical_formula_structural     'C24 H44 LI2 N4 SI2'
_chemical_formula_sum            'C24 H44 Li2 N4 Si2'
_chemical_formula_weight         458.69
_chemical_name_common            nov1699
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_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_conform_dict_location
ftp://ftp.iucr.org/cifdics/cif_core_2.1beta5.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.1beta5
_audit_creation_date             1999-11-15T13:44:18-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 118.617(6)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   9.2590(10)
_cell_length_b                   18.225(2)
_cell_length_c                   9.3338(7)
_cell_measurement_reflns_used    35812
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      22.986
_cell_measurement_theta_min      4.246
_cell_measurement_wavelength     0.71073
_cell_volume                     1382.6(2)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.985
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device       KappaCCD
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1132
_diffrn_reflns_av_sigmaI/netI    0.0614
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            11797
_diffrn_reflns_theta_full        22.98
_diffrn_reflns_theta_max         22.98
_diffrn_reflns_theta_min         4.84
_exptl_absorpt_coefficient_mu    0.146
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.102
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             500
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.1
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.28
_refine_diff_density_min         -0.238
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.186
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     145
_refine_ls_number_reflns         1900
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.186
_refine_ls_R_factor_all          0.1079
_refine_ls_R_factor_gt           0.0815
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0407P)^2^+3.7267P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.189
_refine_ls_wR_factor_ref         0.2
_reflns_number_gt                1469
_reflns_number_total             1900
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b009724l.txt
_cod_data_source_block           nov1699
_cod_original_sg_symbol_H-M      P2(1)/C
_cod_database_code               7010491