Synthesis, Resolution, Structure, and Racemization of Inherently Chiral 1,3-Alternate Azacalix[4]pyrimidines: Quantification of Conformation Mobility.
Li, Jiang-Tao; Wang, Li-Xia; Wang, De-Xian; Zhao, Liang; Wang, Mei-Xiang; The Journal of organic chemistry 79 (2014) 2178–2188; doi:10.1021/jo500054v

data_4029159
_publ_section_title
;
 Synthesis, Resolution, Structure, and Racemization of Inherently Chiral
 1,3-Alternate Azacalix[4]pyrimidines: Quantification of Conformation
 Mobility.
;
_journal_issue                   5
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              2178
_journal_page_last               2188
_journal_paper_doi               10.1021/jo500054v
_journal_volume                  79
_journal_year                    2014
_chemical_formula_moiety         'C20 H18 Br F N12'
_chemical_formula_sum            'C20 H18 Br F N12'
_chemical_formula_weight         525.37
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 123.80(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.842(2)
_cell_length_b                   10.406(2)
_cell_length_c                   20.383(6)
_cell_measurement_reflns_used    7125
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.4665
_cell_measurement_theta_min      1.2022
_cell_volume                     2087.2(9)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_molecular_graphics
;
 Mercury: visualization and analysis of crystal structures, C. F. Macrae,
 P. R. Edgington, P. McCabe, E. Pidcock, G. P. Shields, R. Taylor,
 M. Towler and J. van de Streek, J. Appl. Cryst., 39, 453-457, 2006.
;
_computing_publication_material  'SHELX-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELX-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELX-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'MM007HF + CCD (Saturn724+)'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0356
_diffrn_reflns_av_sigmaI/netI    0.0363
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            13813
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         2.40
_exptl_absorpt_coefficient_mu    2.018
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.6886
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2008)'
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.672
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1064
_exptl_crystal_size_max          0.26
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.715
_refine_diff_density_min         -0.450
_refine_diff_density_rms         0.068
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.245
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     330
_refine_ls_number_reflns         4763
_refine_ls_number_restraints     40
_refine_ls_restrained_S_all      1.245
_refine_ls_R_factor_all          0.0514
_refine_ls_R_factor_gt           0.0487
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0052P)^2^+4.1516P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0996
_refine_ls_wR_factor_ref         0.1006
_reflns_number_gt                4542
_reflns_number_total             4763
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo500054v_si_002.cif
_cod_data_source_block           a
_cod_original_cell_volume        2087.2(8)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               4029159