Synthesis of Molecular Seesaw Balances and the Evaluation of Pyridinium-π Interactions.
Yamada, Shinji; Yamamoto, Natsuo; Takamori, Eri; The Journal of organic chemistry 81 (2016) 11819–11830; doi:10.1021/acs.joc.6b02295

data_4037425
_publ_section_title
;
 Synthesis of Molecular Seesaw Balances and the Evaluation of
 Pyridinium-\p Interactions.
;
_journal_issue                   23
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              11819
_journal_page_last               11830
_journal_paper_doi               10.1021/acs.joc.6b02295
_journal_volume                  81
_journal_year                    2016
_chemical_formula_moiety         'C21 H17 N O'
_chemical_formula_sum            'C21 H17 N O'
_chemical_formula_weight         299.37
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                80.9586(14)
_cell_angle_beta                 77.7960(15)
_cell_angle_gamma                69.4027(13)
_cell_formula_units_Z            2
_cell_length_a                   7.08828(14)
_cell_length_b                   8.6929(2)
_cell_length_c                   12.9545(3)
_cell_measurement_reflns_used    3132
_cell_measurement_temperature    123
_cell_measurement_theta_max      68.05
_cell_measurement_theta_min      3.50
_cell_volume                     727.32(3)
_computing_cell_refinement       'RAPID AUTO'
_computing_data_collection       'RAPID AUTO (Rigaku, ????)'
_computing_data_reduction        'RAPID AUTO'
_computing_molecular_graphics    'CrystalStructure 4.2.1'
_computing_publication_material  'CrystalStructure 4.2.1 (Rigaku, 2016)'
_computing_structure_refinement  'SHELXL Version 2014/7 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXD Version 2013/2 (Sheldrick, 2008)'
_diffrn_ambient_temperature      123
_diffrn_detector_area_resol_mean 10.000
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.972
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54187
_diffrn_reflns_av_R_equivalents  0.0411
_diffrn_reflns_Laue_measured_fraction_full 0.975
_diffrn_reflns_Laue_measured_fraction_max 0.972
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            7756
_diffrn_reflns_point_group_measured_fraction_full 0.975
_diffrn_reflns_point_group_measured_fraction_max 0.972
_diffrn_reflns_theta_full        67.687
_diffrn_reflns_theta_max         68.243
_diffrn_reflns_theta_min         3.505
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.654
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.367
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             316.00
_exptl_crystal_size_max          0.300
_exptl_crystal_size_mid          0.300
_exptl_crystal_size_min          0.100
_refine_diff_density_max         1.00
_refine_diff_density_min         -0.37
_refine_ls_extinction_coef       0.006(2)
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.129
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     209
_refine_ls_number_reflns         2594
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0820
_refine_ls_R_factor_gt           0.0647
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.1242P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1952
_refine_ls_wR_factor_ref         0.2123
_reflns_Friedel_coverage         0.000
_reflns_number_gt                1793
_reflns_number_total             2594
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            jo6b02295_si_002.cif
_cod_data_source_block           Compd-4
_cod_database_code               4037425