Synthesis of Lithium N-pentafluorophenyl,N'-trimethylsilyl 2-Pyridylamidinate and Its Cyclization to Lithium Tetrafluoro-2-(2-pyridyl)benzimidazolate via a Me3SiF Elimination. Coordination Chemistry, Reactivity, and Mechanism
Aharonovich, Sinai; Botoshanski, Mark; Eisen, Moris S.; Inorganic chemistry 48 (2009) 5269–5278; doi:10.1021/ic9002065

data_4338615
_publ_section_title
;
 Synthesis of Lithium N-pentafluorophenyl,N'-trimethylsilyl
 2-Pyridylamidinate and Its Cyclization to Lithium
 Tetrafluoro-2-(2-pyridyl)benzimidazolate via a Me3SiF Elimination.
 Coordination Chemistry, Reactivity, and Mechanism
;
_journal_coden_ASTM              INOCAJ
_journal_issue                   12
_journal_name_full               'Inorganic chemistry'
_journal_page_first              5269
_journal_page_last               5278
_journal_paper_doi               10.1021/ic9002065
_journal_volume                  48
_journal_year                    2009
_chemical_formula_sum            'C21 H27 F5 Li N5 Si'
_chemical_formula_weight         479.51
_chemical_name_common            'Moris-194 (Sinay)'
_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                 113.47(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.987(2)
_cell_length_b                   17.479(3)
_cell_length_c                   14.737(3)
_cell_measurement_reflns_used    16194
_cell_measurement_temperature    240(2)
_cell_measurement_theta_max      25.27
_cell_measurement_theta_min      1.90
_cell_volume                     2596.0(10)
_computing_cell_refinement       'DENZO HKL2000 (Otwinowski & Minor 1997)'
_computing_data_collection       'Collect (Nonius, 2006)'
_computing_data_reduction        'DENZO HKL2000 (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      240(2)
_diffrn_measured_fraction_theta_full 0.955
_diffrn_measured_fraction_theta_max 0.955
_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  0.0890
_diffrn_reflns_av_sigmaI/netI    0.1031
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            16194
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.90
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.143
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.227
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             1000
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.16
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.231
_refine_diff_density_min         -0.189
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.900
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     298
_refine_ls_number_reflns         4357
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.900
_refine_ls_R_factor_all          0.1854
_refine_ls_R_factor_gt           0.0677
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1635
_refine_ls_wR_factor_ref         0.2017
_reflns_number_gt                1721
_reflns_number_total             4357
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic9002065_si_001.cif
_cod_data_source_block           Moris-194
_cod_original_cell_volume        2596.0(8)
_cod_original_sg_symbol_H-M      ' P 21/c'
_cod_database_code               4338615