Hemilabile Ligands in Organolithium Chemistry: Substituent Effects on Lithium Ion Chelation
Antonio Ramírez; Emil Lobkovsky; David B. Collum; Journal of the American Chemical Society 125 (2003) 15376–15387; doi:10.1021/ja030322d

data_4114475
_publ_section_title
;
 Hemilabile Ligands in Organolithium Chemistry: Substituent Effects on
 Lithium Ion Chelation
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15376
_journal_page_last               15387
_journal_paper_doi               10.1021/ja030322d
_journal_volume                  125
_journal_year                    2003
_chemical_formula_sum            'C12 H12 B F4 Li O6'
_chemical_formula_weight         345.97
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 91.507(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   7.8788(2)
_cell_length_b                   13.4921(3)
_cell_length_c                   12.9381(3)
_cell_measurement_temperature    173(2)
_cell_volume                     1374.86(6)
_computing_cell_refinement       SAINT+
_computing_data_collection       SMART
_computing_data_reduction        SAINT+
_computing_molecular_graphics    SHELXTL
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker 1K CCD'
_diffrn_measurement_method       '0.3 deg. omega & phi 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  0.0379
_diffrn_reflns_av_sigmaI/netI    0.0312
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            8954
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         2.99
_exptl_absorpt_coefficient_mu    0.162
_exptl_absorpt_correction_T_max  0.9531
_exptl_absorpt_correction_T_min  0.8236
_exptl_absorpt_correction_type   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.671
_exptl_crystal_description       block
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.323
_refine_diff_density_min         -0.337
_refine_diff_density_rms         0.061
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.005
_refine_ls_hydrogen_treatment    isotropic
_refine_ls_matrix_type           full
_refine_ls_number_parameters     243
_refine_ls_number_reflns         2804
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.005
_refine_ls_R_factor_all          0.0592
_refine_ls_R_factor_gt           0.0467
_refine_ls_shift/su_max          0.627
_refine_ls_shift/su_mean         0.122
_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          0.1285
_refine_ls_wR_factor_ref         0.1366
_reflns_number_gt                2272
_reflns_number_total             2804
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja030322d_si2_2.cif
_cod_data_source_block           anton2
_cod_database_code               4114475