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_1506656
_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 H22 I N O2'
_chemical_formula_weight         387.25
_chemical_melting_point          531
_chemical_name_systematic
'4-(4-Hydroxy-2,6-dimethyl-phenyl)-1,3,5-trimethyl-pyridinium iodide'
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_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                 109.661(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   27.251(7)
_cell_length_b                   11.5610(18)
_cell_length_c                   11.868(3)
_cell_measurement_temperature    153(2)
_cell_volume                     3521.0(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 0.923
_diffrn_measured_fraction_theta_max 0.923
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'omega 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  0.0366
_diffrn_reflns_av_sigmaI/netI    0.0273
_diffrn_reflns_limit_h_max       35
_diffrn_reflns_limit_h_min       -35
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            15979
_diffrn_reflns_theta_full        28.88
_diffrn_reflns_theta_max         28.88
_diffrn_reflns_theta_min         1.59
_exptl_absorpt_coefficient_mu    1.820
_exptl_absorpt_correction_T_max  0.9264
_exptl_absorpt_correction_T_min  0.5903
_exptl_absorpt_correction_type   integration
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.461
_exptl_crystal_density_meas      0
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             1552
_exptl_crystal_size_max          0.464
_exptl_crystal_size_mid          0.122
_exptl_crystal_size_min          0.042
_refine_diff_density_max         1.205
_refine_diff_density_min         -0.989
_refine_diff_density_rms         0.088
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.029
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         4275
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.029
_refine_ls_R_factor_all          0.0455
_refine_ls_R_factor_gt           0.0320
_refine_ls_shift/su_max          0.307
_refine_ls_shift/su_mean         0.023
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0383P)^2^+7.0496P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0756
_refine_ls_wR_factor_ref         0.0840
_reflns_number_gt                3419
_reflns_number_total             4275
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol051365xsi20050610_091258.cif
_cod_data_source_block           s63n1m
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        3521.1(13)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1506656