Peptoid Atropisomers
Bishwajit Paul; Glenn L. Butterfoss; Mikki G. Boswell; P. Douglas Renfrew; Fanny G. Yeung; Neel H. Shah; Christian Wolf; Richard Bonneau; Kent Kirshenbaum; Journal of the American Chemical Society 133 (2011) 10910–10919; doi:10.1021/ja2028684

data_4106406
_publ_section_title
;
 Peptoid Atropisomers
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10910
_journal_page_last               10919
_journal_paper_doi               10.1021/ja2028684
_journal_volume                  133
_journal_year                    2011
_chemical_formula_moiety         'C16 H21 N O5'
_chemical_formula_sum            'C16 H21 N O5'
_chemical_formula_weight         307.34
_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                 96.0170(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.6027(7)
_cell_length_b                   10.4781(8)
_cell_length_c                   17.9484(14)
_cell_measurement_reflns_used    9855
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.74
_cell_measurement_theta_min      2.25
_cell_volume                     1609.0(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w 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  0.0324
_diffrn_reflns_av_sigmaI/netI    0.0124
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            61193
_diffrn_reflns_theta_full        29.75
_diffrn_reflns_theta_max         29.75
_diffrn_reflns_theta_min         2.25
_exptl_absorpt_coefficient_mu    0.094
_exptl_absorpt_correction_T_max  0.9847
_exptl_absorpt_correction_T_min  0.9463
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.269
_exptl_crystal_description       block
_exptl_crystal_F_000             656
_exptl_crystal_size_max          0.59
_exptl_crystal_size_mid          0.36
_exptl_crystal_size_min          0.16
_refine_diff_density_max         0.437
_refine_diff_density_min         -0.209
_refine_diff_density_rms         0.041
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.041
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     204
_refine_ls_number_reflns         4573
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.041
_refine_ls_R_factor_all          0.0387
_refine_ls_R_factor_gt           0.0343
_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^)+(0.0517P)^2^+0.4527P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0923
_refine_ls_wR_factor_ref         0.0969
_reflns_number_gt                4117
_reflns_number_total             4573
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja2028684_si_002.cif
_cod_data_source_block           09ktk1h
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               4106406