From Classical Adducts to Frustrated Lewis Pairs: Steric Effects in the Interactions of Pyridines and B(C6F5)3
Stephen J. Geier; Austin L. Gille; Thomas M. Gilbert; Douglas W. Stephan; Inorganic Chemistry 48 (2009) 10466–10474; doi:10.1021/ic901726b

data_4303539
_publ_section_title
;
From Classical Adducts to Frustrated Lewis Pairs: Steric Effects in the
Interactions of Pyridines and B(C6F5)3
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              10466
_journal_page_last               10474
_journal_paper_doi               10.1021/ic901726b
_journal_volume                  48
_journal_year                    2009
_chemical_formula_sum            'C25 H9 B F15 N'
_chemical_formula_weight         619.14
_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   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 100.156(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.8108(4)
_cell_length_b                   13.4663(4)
_cell_length_c                   13.3937(4)
_cell_measurement_reflns_used    9862
_cell_measurement_temperature    150
_cell_measurement_theta_max      32.27
_cell_measurement_theta_min      2.21
_cell_volume                     2274.40(12)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150
_diffrn_measured_fraction_theta_full 0.971
_diffrn_measured_fraction_theta_max 0.971
_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  0.0293
_diffrn_reflns_av_sigmaI/netI    0.0209
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            56522
_diffrn_reflns_theta_full        32.42
_diffrn_reflns_theta_max         32.42
_diffrn_reflns_theta_min         2.03
_exptl_absorpt_coefficient_mu    0.192
_exptl_absorpt_correction_T_max  0.9811
_exptl_absorpt_correction_T_min  0.9626
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.808
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       blocks
_exptl_crystal_F_000             1224
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.628
_refine_diff_density_min         -0.583
_refine_diff_density_rms         0.074
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     379
_refine_ls_number_reflns         7942
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0709
_refine_ls_R_factor_gt           0.0494
_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^)+(0.0633P)^2^+2.2750P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1275
_refine_ls_wR_factor_ref         0.1475
_reflns_number_gt                6118
_reflns_number_total             7942
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic901726b_si_002_09.cif
_cod_data_source_block           (2,6-Me2C5H3N)B(C6F5)3
_cod_database_code               4303539