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_4037426
_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_absolute_configuration 'CHOOSE rm ad rmad syn or unk'
_chemical_formula_moiety         'C23 H21 N O2'
_chemical_formula_sum            'C23 H21 N O2'
_chemical_formula_weight         343.42
_space_group_crystal_system      orthorhombic
_space_group_IT_number           19
_space_group_name_Hall           'P 2ac 2ab'
_space_group_name_H-M_alt        'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                90.0000
_cell_angle_beta                 90.0000
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   8.4704(3)
_cell_length_b                   12.2155(4)
_cell_length_c                   16.9196(5)
_cell_measurement_reflns_used    6563
_cell_measurement_temperature    123
_cell_measurement_theta_max      68.14
_cell_measurement_theta_min      3.62
_cell_volume                     1750.67(10)
_computing_cell_refinement       'RAPID AUTO'
_computing_data_collection       'RAPID AUTO (Rigaku, ????)'
_computing_data_reduction        'RAPID AUTO'
_computing_molecular_graphics    'CrystalStructure 4.2'
_computing_publication_material  'CrystalStructure 4.2 (Rigaku, 2015)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      123
_diffrn_detector_area_resol_mean 10.000
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_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  0.0504
_diffrn_reflns_Laue_measured_fraction_full 0.000
_diffrn_reflns_Laue_measured_fraction_max 0.000
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            17400
_diffrn_reflns_point_group_measured_fraction_full 0.000
_diffrn_reflns_point_group_measured_fraction_max 0.000
_diffrn_reflns_theta_full        68.200
_diffrn_reflns_theta_max         68.200
_diffrn_reflns_theta_min         4.464
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.655
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.303
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             728.00
_exptl_crystal_size_max          0.600
_exptl_crystal_size_mid          0.500
_exptl_crystal_size_min          0.400
_refine_diff_density_max         0.17
_refine_diff_density_min         -0.18
_refine_ls_abs_structure_details
'Flack, H. D. (1983), Acta Cryst. A39, 876-881.  1341 Friedel Pairs'
_refine_ls_abs_structure_Flack   0.1(2)
_refine_ls_extinction_coef       0.0029(3)
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3181
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0408
_refine_ls_R_factor_gt           0.0383
_refine_ls_shift/su_max          0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0359P)^2^+0.4364P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0840
_refine_ls_wR_factor_ref         0.0853
_reflns_number_gt                3038
_reflns_number_total             3181
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            jo6b02295_si_002.cif
_cod_data_source_block           Compd-5
_cod_original_cell_volume        1750.67(9)
_cod_database_code               4037426