Simultaneous formation of helical and sheet-like assemblies from short azapeptides enables spontaneous resolution.
Yan, Xiaosheng; Weng, Peimin; Cao, Jinlian; Lin, Kexin; Qi, Yuanwei; Wu, Xin; Jiang, Yun-Bao; Nanoscale 16 (2024) 19221–19227; doi:10.1039/d4nr02872d

data_1572720
_publ_section_title
;
 Simultaneous formation of helical and sheet-like assemblies from short
 azapeptides enables spontaneous resolution.
;
_journal_issue                   41
_journal_name_full               Nanoscale
_journal_page_first              19221
_journal_page_last               19227
_journal_paper_doi               10.1039/d4nr02872d
_journal_volume                  16
_journal_year                    2024
_chemical_absolute_configuration rmad
_chemical_formula_moiety         'C17 H18 N4 O2 S'
_chemical_formula_sum            'C17 H18 N4 O2 S'
_chemical_formula_weight         342.41
_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
_audit_block_doi                 10.5517/ccdc.csd.cc2527r8
_audit_creation_date             2020-04-20
_audit_creation_method
;
Olex2 1.2
(compiled 2017.08.10 svn.r3458 for OlexSys, GUI svn.r5381)
;
_audit_update_record
;
2020-04-21 deposited with the CCDC.	2024-09-30 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   4.7117(2)
_cell_length_b                   15.8669(8)
_cell_length_c                   22.3016(12)
_cell_measurement_reflns_used    2725
_cell_measurement_temperature    100.01(10)
_cell_measurement_theta_max      28.6540
_cell_measurement_theta_min      3.8900
_cell_volume                     1667.27(14)
_computing_cell_refinement       'Bruker FRAMBO'
_computing_data_collection       'Bruker FRAMBO'
_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 (Sheldrick, 2015)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100.01(10)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0223
_diffrn_reflns_av_unetI/netI     0.0415
_diffrn_reflns_Laue_measured_fraction_full 0.997
_diffrn_reflns_Laue_measured_fraction_max 0.996
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -13
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            4598
_diffrn_reflns_point_group_measured_fraction_full 0.975
_diffrn_reflns_point_group_measured_fraction_max 0.975
_diffrn_reflns_theta_full        25.000
_diffrn_reflns_theta_max         25.000
_diffrn_reflns_theta_min         3.654
_exptl_absorpt_coefficient_mu    0.212
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.90794
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.36.28 (release 01-02-2013 CrysAlis171 .NET)
(compiled Feb  1 2013,16:14:44)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.364
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             720
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.313
_refine_diff_density_min         -0.297
_refine_diff_density_rms         0.043
_refine_ls_abs_structure_details
;
 Flack x determined using 967 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.08(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.065
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     217
_refine_ls_number_reflns         2876
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.065
_refine_ls_R_factor_all          0.0377
_refine_ls_R_factor_gt           0.0329
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0319P)^2^+0.2684P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0727
_refine_ls_wR_factor_ref         0.0759
_reflns_Friedel_coverage         0.642
_reflns_Friedel_fraction_full    0.943
_reflns_Friedel_fraction_max     0.943
_reflns_number_gt                2659
_reflns_number_total             2876
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            d4nr02872d2.cif
_cod_data_source_block           p
_cod_depositor_comments
'Adding full bibliography for 1572720--1572724.cif.'
_cod_database_code               1572720
_shelx_shelxl_version_number     2014/8
_olex2_refinement_description
;
1. Fixed Uiso
 At 1.2 times of:
  All C(H) groups, All N(H) groups
 At 1.5 times of:
  All C(H,H,H) groups
2.a Ternary CH refined with riding coordinates:
 C9(H9)
2.b Me refined with riding coordinates:
 C1(H1A,H1B,H1C)
2.c Aromatic/amide H refined with riding coordinates:
 N1(H1), N2(H2), N4(H4), N3(H3), C3(H3A), C4(H4A), C5(H5), C8(H8), C10(H10),
 C11(H11), C13(H13), C14(H14), C15(H15), C16(H16)
;
_shelx_res_checksum              14960
_shelx_hkl_checksum              5620
_olex2_submission_special_instructions 'No special instructions were received'