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_4338616
_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            'C18 H18 F4 Li N5'
_chemical_formula_weight         387.31
_chemical_name_common            'Moris-189 (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                 106.45(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.897(2)
_cell_length_b                   11.960(2)
_cell_length_c                   12.980(3)
_cell_measurement_reflns_used    12523
_cell_measurement_temperature    240(1)
_cell_measurement_theta_max      25.33
_cell_measurement_theta_min      2.36
_cell_volume                     1920.2(7)
_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(1)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       phi-scan
_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  0.0490
_diffrn_reflns_av_sigmaI/netI    0.0447
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            12523
_diffrn_reflns_theta_full        25.33
_diffrn_reflns_theta_max         25.33
_diffrn_reflns_theta_min         2.36
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.109
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.340
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             800
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.199
_refine_diff_density_min         -0.205
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.996
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     273
_refine_ls_number_reflns         3488
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.996
_refine_ls_R_factor_all          0.0881
_refine_ls_R_factor_gt           0.0516
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0979P)^2^+0.1467P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1401
_refine_ls_wR_factor_ref         0.1576
_reflns_number_gt                2297
_reflns_number_total             3488
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic9002065_si_001.cif
_cod_data_source_block           moris189
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
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        1920.2(6)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4338616