NMR Spectroscopic and Computational Study of Conformational Isomerism in Substituted 2-Aryl-3H-1-benzazepines: Toward Isolable Atropisomeric Benzazepine Enantiomers
Keith Ramig; Edyta M. Greer; David J. Szalda; Sasan Karimi; Allen Ko; Laura Boulos; Jiansan Gu; Nathan Dvorkin; Hema Bhramdat; Gopal Subramaniam; Journal of Organic Chemistry 78 (2013) 8028–8036; doi:10.1021/jo4013089

data_4028507
_publ_section_title
;
 NMR Spectroscopic and Computational Study of Conformational Isomerism in
 Substituted 2-Aryl-3H-1-benzazepines: Toward Isolable Atropisomeric
 Benzazepine Enantiomers
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              8028
_journal_page_last               8036
_journal_paper_doi               10.1021/jo4013089
_journal_volume                  78
_journal_year                    2013
_chemical_formula_moiety         'C23 H19 N'
_chemical_formula_sum            'C23 H19 N'
_chemical_formula_weight         309.39
_space_group_IT_number           41
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'A 2 -2ab'
_symmetry_space_group_name_H-M   'A b a 2'
_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                   13.2591(4)
_cell_length_b                   25.5247(7)
_cell_length_c                   10.0154(3)
_cell_measurement_reflns_used    6889
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.86
_cell_measurement_theta_min      2.67
_cell_volume                     3389.56(17)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0373
_diffrn_reflns_av_sigmaI/netI    0.0206
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -33
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            16296
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.21
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.070
_exptl_absorpt_correction_T_max  0.7460
_exptl_absorpt_correction_T_min  0.5998
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
; 
      SADABS Version 2007/2 (Sheldrick, Bruker AXS Inc.) 
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.213
_exptl_crystal_description       prism
_exptl_crystal_F_000             1312
_exptl_crystal_size_max          .5
_exptl_crystal_size_mid          .5
_exptl_crystal_size_min          .4
_refine_diff_density_max         0.125
_refine_diff_density_min         -0.133
_refine_diff_density_rms         0.026
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.055
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         2057
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0421
_refine_ls_R_factor_gt           0.0346
_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^)+(0.0509P)^2^+0.5348P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0891
_refine_ls_wR_factor_ref         0.0943
_reflns_number_gt                1814
_reflns_number_total             2057
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo4013089_si_002.cif
_cod_data_source_block           2g
_cod_database_code               4028507