Reverse Turn and Loop Secondary Structures in Stereodefined Cyclic Peptoid Scaffolds.
D'Amato, Assunta; Pierri, Giovanni; Tedesco, Consiglia; Della Sala, Giorgio; Izzo, Irene; Costabile, Chiara; De Riccardis, Francesco; The Journal of organic chemistry 84 (2019) 10911–10928; doi:10.1021/acs.joc.9b01509

data_4033872
_publ_section_title
;
 Reverse Turn and Loop Secondary Structures in Stereodefined Cyclic
 Peptoid Scaffolds.
;
_journal_issue                   17
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              10911
_journal_page_last               10928
_journal_paper_doi               10.1021/acs.joc.9b01509
_journal_volume                  84
_journal_year                    2019
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C60 H66 N6 O6'
_chemical_formula_sum            'C60 H66 N6 O6'
_chemical_formula_weight         967.18
_space_group_crystal_system      monoclinic
_space_group_IT_number           4
_space_group_name_Hall           'P 2yb'
_space_group_name_H-M_alt        'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_date             2019-02-13
_audit_creation_method
;
Olex2 1.2
(compiled 2018.05.29 svn.r3508 for OlexSys, GUI svn.r5506)
;
_cell_angle_alpha                90
_cell_angle_beta                 97.523(17)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   10.962(4)
_cell_length_b                   19.047(5)
_cell_length_c                   12.850(4)
_cell_measurement_reflns_used    8332
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      72.28
_cell_measurement_theta_min      3.45
_cell_volume                     2659.9(15)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'SHELXL-2014 (Sheldrick 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick 2008)'
_diffrn_ambient_temperature      296.15
_diffrn_measured_fraction_theta_full 0.980
_diffrn_measured_fraction_theta_max 0.965
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0322
_diffrn_reflns_av_unetI/netI     0.0345
_diffrn_reflns_Laue_measured_fraction_full 0.980
_diffrn_reflns_Laue_measured_fraction_max 0.965
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       23
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            34865
_diffrn_reflns_point_group_measured_fraction_full 0.972
_diffrn_reflns_point_group_measured_fraction_max 0.947
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         72.585
_diffrn_reflns_theta_min         3.469
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.624
_exptl_absorpt_correction_T_max  0.7536
_exptl_absorpt_correction_T_min  0.6835
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 (Bruker,2014/5) was used for absorption correction.
wR2(int) was 0.1342 before and 0.0585 after correction.
The Ratio of minimum to maximum transmission is 0.9070.
The \l/2 correction factor is Not present.
;
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.208
_exptl_crystal_description       prism
_exptl_crystal_F_000             1032
_exptl_crystal_size_max          0.37
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.21
_refine_diff_density_max         0.149
_refine_diff_density_min         -0.118
_refine_diff_density_rms         0.022
_refine_ls_abs_structure_details
;
 Flack x determined using 4236 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.04(7)
_refine_ls_extinction_coef       0.0117(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2018/3 (Sheldrick 2018)'
_refine_ls_goodness_of_fit_ref   1.024
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     656
_refine_ls_number_reflns         10023
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.024
_refine_ls_R_factor_all          0.0371
_refine_ls_R_factor_gt           0.0347
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0479P)^2^+0.2361P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0900
_refine_ls_wR_factor_ref         0.0919
_reflns_Friedel_coverage         0.902
_reflns_Friedel_fraction_full    0.962
_reflns_Friedel_fraction_max     0.927
_reflns_number_gt                9465
_reflns_number_total             10023
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo9b01509_si_002.cif
_cod_data_source_block           tbe267_1_0m_a
_cod_original_cell_volume        2659.9(16)
_cod_database_code               4033872
_shelx_shelxl_version_number     2018/3
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All C(H,H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C3(H3), C13(H13), C23(H23), C33(H33), C43(H43), C53(H53)
2.b Secondary CH2 refined with riding coordinates:
 C1(H1A,H1B), C11(H11A,H11B), C21(H21A,H21B), C31(H31A,H31B), C41(H41A,H41B),
 C51(H51A,H51B)
2.c Aromatic/amide H refined with riding coordinates:
 C6(H6), C7(H7), C8(H8), C9(H9), C10(H10), C16(H16), C17(H17), C18(H18),
 C19(H19), C20(H20), C26(H26), C27(H27), C28(H28), C29(H29), C30(H30), C36(H36),
  C37(H37), C38(H38), C39(H39), C40(H40), C46(H46), C47(H47), C48(H48),
 C49(H49), C50(H50), C56(H56), C57(H57), C58(H58), C59(H59), C60(H60)
2.d Idealised Me refined as rotating group:
 C4(H4A,H4B,H4C), C14(H14A,H14B,H14C), C24(H24A,H24B,H24C), C34(H34A,H34B,
 H34C), C44(H44A,H44B,H44C), C54(H54A,H54B,H54C)
;
_shelx_res_checksum              31905
_shelx_hkl_checksum              62473
_olex2_submission_special_instructions 'No special instructions were received'