Small Head-to-Tail Macrocyclic α-Peptoids.
Culf, Adrian S.; Cuperlović-Culf, Miroslava; Léger, Daniel A; Decken, Andreas; Organic letters 16 (2014) 2780–2783; doi:10.1021/ol501102b

data_1515988
_publ_section_title
;
 Small Head-to-Tail Macrocyclic \a-Peptoids.
;
_journal_issue                   10
_journal_name_full               'Organic letters'
_journal_page_first              2780
_journal_page_last               2783
_journal_paper_doi               10.1021/ol501102b
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C36 H36 N4 O4'
_chemical_formula_sum            'C36 H36 N4 O4'
_chemical_formula_weight         588.69
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      61
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.915(4)
_cell_length_b                   10.002(3)
_cell_length_c                   27.209(9)
_cell_measurement_reflns_used    5312
_cell_measurement_temperature    188(1)
_cell_measurement_theta_max      27.37
_cell_measurement_theta_min      2.86
_cell_volume                     2970.5(17)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL (Sheldrick, 2008)'
_computing_publication_material  'Bruker SHELXTL (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      188(1)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 0.963
_diffrn_measurement_device_type  'Bruker AXS SMART1000/P4'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0736
_diffrn_reflns_av_sigmaI/netI    0.0578
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            18116
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.50
_diffrn_source                   'fine-focus sealed tube'
_diffrn_source_type              K760
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.087
_exptl_absorpt_correction_T_max  0.9978
_exptl_absorpt_correction_T_min  0.9417
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.316
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Plate
_exptl_crystal_F_000             1248
_exptl_crystal_recrystallization_method CHCl3/EtOH
_exptl_crystal_size_max          0.70
_exptl_crystal_size_mid          0.40
_exptl_crystal_size_min          0.03
_refine_diff_density_max         0.343
_refine_diff_density_min         -0.259
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.068
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     271
_refine_ls_number_reflns         3286
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.068
_refine_ls_R_factor_all          0.1129
_refine_ls_R_factor_gt           0.0607
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0675P)^2^+2.1052P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1353
_refine_ls_wR_factor_ref         0.1642
_reflns_number_gt                2032
_reflns_number_total             3286
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ol501102b_si_004.cif
_cod_data_source_block           ac131171
_cod_depositor_comments
'Adding full bibliography for 1515988--1515991.cif.'
_cod_original_cell_volume        2970.3(17)
_cod_original_sg_symbol_Hall     '-P 2ac 2ab '
_cod_database_code               1515988