β-Turn structure in glycinylphenylalanine dipeptide based N-amidothioureas
Yan, Xiao-Sheng; Wu, Kun; Yuan, Yuan; Zhan, Ying; Wang, Jin-He; Li, Zhao; Jiang, Yun-Bao; Chemical Communications (Cambridge, United Kingdom) 49 (2013) 8943–8945; doi:10.1039/c3cc44336a

data_7109798
_publ_section_title
;
 \b-Turn structure in glycinylphenylalanine dipeptide based N-amidothioureas
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   79
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              8943
_journal_page_last               8945
_journal_paper_doi               10.1039/c3cc44336a
_journal_volume                  49
_journal_year                    2013
_chemical_formula_sum            'C20 H25 N5 O3'
_chemical_formula_weight         383.45
_space_group_IT_number           19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.6444(15)
_cell_length_b                   15.088(3)
_cell_length_c                   15.404(3)
_cell_measurement_temperature    273(2)
_cell_volume                     2009.1(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      273(2)
_diffrn_measured_fraction_theta_full 0.962
_diffrn_measured_fraction_theta_max 0.962
_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  0.0451
_diffrn_reflns_av_sigmaI/netI    0.0505
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            11532
_diffrn_reflns_theta_full        28.36
_diffrn_reflns_theta_max         28.36
_diffrn_reflns_theta_min         1.89
_exptl_absorpt_coefficient_mu    0.088
_exptl_crystal_density_diffrn    1.268
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             816
_refine_diff_density_max         0.454
_refine_diff_density_min         -0.317
_refine_diff_density_rms         0.046
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -1.7(10)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.033
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     255
_refine_ls_number_reflns         4677
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.033
_refine_ls_R_factor_all          0.0470
_refine_ls_R_factor_gt           0.0443
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0761P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1172
_refine_ls_wR_factor_ref         0.1193
_reflns_number_gt                4331
_reflns_number_total             4677
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3cc44336a_2.txt
_cod_data_source_block           m
_cod_original_cell_volume        2009.1(6)
_cod_database_code               7109798