Solid-state structure of cyclic dipeptides: an X-ray and computational study of <i>cis-</i> and <i>trans</i>-diketopiperazines of <i>N</i>-methyl-phenylalanine with the thia-pipecolic acids and thia-prolines
Budesinsky, Milos; Cisarova, Ivana; Borremans, Frans; Martins, Jose C.; Pauwels, Ewald; Acta Crystallographica Section B 73 (2017) 1179–1193; doi:10.1107/S2052520617014731

data_2108203
_publ_section_title
;
 Solid-state structure of cyclic dipeptides: an X-ray and computational
 study of <i>cis-</i> and <i>trans</i>-diketopiperazines of
 <i>N</i>-methyl-phenylalanine with the thia-pipecolic acids and
 thia-prolines
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              1179
_journal_page_last               1193
_journal_paper_doi               10.1107/S2052520617014731
_journal_volume                  73
_journal_year                    2017
_chemical_absolute_configuration ad
_chemical_compound_source        'synthesized by the authors'
_chemical_formula_moiety         'C14 H16 N2 O2 S'
_chemical_formula_sum            'C14 H16 N2 O2 S'
_chemical_formula_weight         276.35
_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'
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   7.7112(7)
_cell_length_b                   11.6576(12)
_cell_length_c                   14.8171(14)
_cell_measurement_reflns_used    3930
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.44
_cell_measurement_theta_min      2.75
_cell_volume                     1332.0(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0468
_diffrn_reflns_av_unetI/netI     0.0470
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            8310
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         27.483
_diffrn_reflns_theta_min         2.223
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    0.242
_exptl_absorpt_correction_T_max  0.9482
_exptl_absorpt_correction_T_min  0.8948
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2014/5 - Bruker AXS area detector scaling and absorption correction
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.378
_exptl_crystal_description       prism
_exptl_crystal_F_000             584
_exptl_crystal_size_max          0.469
_exptl_crystal_size_mid          0.316
_exptl_crystal_size_min          0.222
_refine_diff_density_max         0.275
_refine_diff_density_min         -0.224
_refine_diff_density_rms         0.048
_refine_ls_abs_structure_details
;
 Flack x determined using 1085 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   -0.03(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.042
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     173
_refine_ls_number_reflns         3051
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.042
_refine_ls_R_factor_all          0.0403
_refine_ls_R_factor_gt           0.0348
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0393P)^2^+0.0987P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0788
_refine_ls_wR_factor_ref         0.0820
_reflns_Friedel_coverage         0.730
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.999
_reflns_number_gt                2789
_reflns_number_total             3051
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            dk5056sup1.cif
_cod_data_source_block           14a
_cod_database_code               2108203
_cod_database_fobs_code          2108203
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.895
_shelx_estimated_absorpt_t_max   0.948
_shelx_res_checksum              3795
_shelx_hkl_checksum              13741