Intramolecular frustrated N/B lewis pairs by enamine hydroboration
Schwendemann, Sina; Fröhlich, Roland; Kehr, Gerald; Erker, Gerhard; Chemical Science 2 (2011) 1842–; doi:10.1039/c1sc00124h

data_1515651
_publ_section_title
;
 Intramolecular frustrated N/B lewis pairs by enamine hydroboration
;
_journal_issue                   9
_journal_name_full               'Chemical Science'
_journal_page_first              1842
_journal_paper_doi               10.1039/c1sc00124h
_journal_volume                  2
_journal_year                    2011
_chemical_formula_sum            'C24 H18 B F10 N'
_chemical_formula_weight         521.20
_space_group_IT_number           114
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'P -4 2n'
_symmetry_space_group_name_H-M   'P -4 21 c'
_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            8
_cell_length_a                   22.3613(6)
_cell_length_b                   22.3613(6)
_cell_length_c                   8.7343(3)
_cell_measurement_reflns_used    6313
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      68.25
_cell_measurement_theta_min      0.88
_cell_volume                     4367.4(2)
_computing_cell_refinement       'Collect (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'XP (BrukerAXS, 2000)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.991
_diffrn_measured_fraction_theta_max 0.991
_diffrn_measurement_device_type  'Nonius KappaCCD APEXII'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.066
_diffrn_reflns_av_sigmaI/netI    0.0411
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            33954
_diffrn_reflns_theta_full        67.79
_diffrn_reflns_theta_max         67.79
_diffrn_reflns_theta_min         3.95
_exptl_absorpt_coefficient_mu    1.349
_exptl_absorpt_correction_T_max  0.9115
_exptl_absorpt_correction_T_min  0.6496
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'Denzo (otwinowski, Borek, Majewski & Minor, 2003)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.585
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             2112
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.186
_refine_diff_density_min         -0.161
_refine_diff_density_rms         0.045
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.45(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     327
_refine_ls_number_reflns         3881
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0420
_refine_ls_R_factor_gt           0.0383
_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^)+(0.0666P)^2^+0.4688P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1005
_refine_ls_wR_factor_ref         0.1043
_reflns_number_gt                3572
_reflns_number_total             3881
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1sc00124h.txt
_cod_data_source_block           erk5414
_cod_original_sg_symbol_H-M      P-421c
_cod_database_code               1515651