Efficient synthesis and structural characteristics of zwitterionic twisted pi-electron system biaryls.
Kang, Hu; Facchetti, Antonio; Stern, Charlotte L.; Rheingold, Arnold L.; Kassel, W. Scott; Marks, Tobin J.; Organic letters 7 (2005) 3721–3724; doi:10.1021/ol051365x

data_1506653
_publ_section_title
;
 Efficient synthesis and structural characteristics of zwitterionic
 twisted pi-electron system biaryls.
;
_journal_issue                   17
_journal_name_full               'Organic letters'
_journal_page_first              3721
_journal_page_last               3724
_journal_paper_doi               10.1021/ol051365x
_journal_volume                  7
_journal_year                    2005
_chemical_formula_sum            'C16 H19 N O2'
_chemical_formula_weight         257.32
_chemical_melting_point          468
_chemical_name_systematic
4-(4-methoxy-2,6-dimethyl-phenyl)-3,5-dimethyl-pyridin-1-ol
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      15
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 119.049(12)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   21.018(6)
_cell_length_b                   8.137(3)
_cell_length_c                   18.221(4)
_cell_measurement_temperature    153(2)
_cell_volume                     2724.2(14)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_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      153(2)
_diffrn_measured_fraction_theta_full 0.917
_diffrn_measured_fraction_theta_max 0.917
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0351
_diffrn_reflns_av_sigmaI/netI    0.0261
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            12351
_diffrn_reflns_theta_full        28.96
_diffrn_reflns_theta_max         28.96
_diffrn_reflns_theta_min         2.22
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.082
_exptl_absorpt_correction_T_max  0.9772
_exptl_absorpt_correction_T_min  0.9383
_exptl_absorpt_correction_type   integration
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.255
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cut
_exptl_crystal_F_000             1104
_exptl_crystal_size_max          0.488
_exptl_crystal_size_mid          0.330
_exptl_crystal_size_min          0.274
_refine_diff_density_max         0.379
_refine_diff_density_min         -0.247
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.100
_refine_ls_hydrogen_treatment    fixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     177
_refine_ls_number_reflns         3314
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.100
_refine_ls_R_factor_all          0.0653
_refine_ls_R_factor_gt           0.0525
_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0874P)^2^+1.3782P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1420
_refine_ls_wR_factor_ref         0.1552
_reflns_number_gt                2583
_reflns_number_total             3314
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol051365xsi20050610_091258.cif
_cod_data_source_block           s28n
_cod_original_cell_volume        2724.1(13)
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               1506653