Frustrated Lewis Pairs and Ring-Opening of THF, Dioxane, and Thioxane†
Birkmann, Birgit; Voss, Tanja; Geier, Stephen J.; Ullrich, Matthias; Kehr, Gerald; Erker, Gerhard; Stephan, Douglas W.; Organometallics 29 (2010) 5310–; doi:10.1021/om1003896

data_4066295
_publ_section_title
;
 Frustrated Lewis Pairs and Ring-Opening of THF, Dioxane, and
 Thioxane&#x2020;
;
_journal_issue                   21
_journal_name_full               Organometallics
_journal_page_first              5310
_journal_paper_doi               10.1021/om1003896
_journal_volume                  29
_journal_year                    2010
_chemical_formula_sum            'C29 H17 B F15 N O'
_chemical_formula_weight         691.25
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   17.4334(9)
_cell_length_b                   10.6793(6)
_cell_length_c                   14.4679(8)
_cell_measurement_temperature    296(2)
_cell_volume                     2693.6(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_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  0.0205
_diffrn_reflns_av_sigmaI/netI    0.0276
_diffrn_reflns_limit_h_max       31
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            35400
_diffrn_reflns_theta_full        40.01
_diffrn_reflns_theta_max         40.01
_diffrn_reflns_theta_min         2.24
_exptl_absorpt_coefficient_mu    0.175
_exptl_absorpt_correction_T_max  0.9335
_exptl_absorpt_correction_T_min  0.9178
_exptl_absorpt_correction_type   empirical
_exptl_crystal_density_diffrn    1.705
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1384
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.40
_refine_diff_density_max         0.542
_refine_diff_density_min         -0.497
_refine_diff_density_rms         0.064
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.1(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.046
_refine_ls_hydrogen_treatment    fixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     424
_refine_ls_number_reflns         13352
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.046
_refine_ls_R_factor_all          0.0524
_refine_ls_R_factor_gt           0.0389
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0693P)^2^+0.1745P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1063
_refine_ls_wR_factor_ref         0.1146
_reflns_number_gt                10991
_reflns_number_total             13352
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om1003896_si_002.cif
_cod_data_source_block           2,6-Me2C5H3N(CH2)4OB(C6F5)3
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               4066295