Peptidyl-Prolyl Model Study: How Does the Electronic Effect Influence the Amide Bond Conformation?
Mykhailiuk, Pavel K.; Kubyshkin, Vladimir; Bach, Thorsten; Budisa, Nediljko; The Journal of organic chemistry 82 (2017) 8831–8841; doi:10.1021/acs.joc.7b00803

data_4032702
_publ_section_title
;
 Peptidyl-Prolyl Model Study: How Does the Electronic Effect Influence the
 Amide Bond Conformation?
;
_journal_issue                   17
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              8831
_journal_page_last               8841
_journal_paper_doi               10.1021/acs.joc.7b00803
_journal_volume                  82
_journal_year                    2017
_chemical_absolute_configuration rmad
_chemical_formula_sum            'C9 H15 N O3'
_chemical_formula_weight         185.22
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_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           'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.05900(10)
_cell_length_b                   9.22611(12)
_cell_length_c                   13.21005(17)
_cell_measurement_reflns_used    3152
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      73.0560
_cell_measurement_theta_min      5.4720
_cell_volume                     982.21(2)
_computing_cell_refinement       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      150.00(10)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 10.5435
_diffrn_detector_type            Atlas
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Single source at offset, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Cu K\a'
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0167
_diffrn_reflns_av_sigmaI/netI    0.0180
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            3502
_diffrn_reflns_theta_full        67.47
_diffrn_reflns_theta_max         67.47
_diffrn_reflns_theta_min         5.85
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.775
_exptl_absorpt_correction_T_max  0.9059
_exptl_absorpt_correction_T_min  0.8541
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.41 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.253
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             400
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.13
_refine_diff_density_max         0.169
_refine_diff_density_min         -0.142
_refine_diff_density_rms         0.036
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.02(18)
_refine_ls_extinction_coef       0.0293(17)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.076
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     122
_refine_ls_number_reflns         1729
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.076
_refine_ls_R_factor_all          0.0272
_refine_ls_R_factor_gt           0.0261
_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^)+(0.0419P)^2^+0.1174P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0678
_refine_ls_wR_factor_ref         0.0685
_reflns_number_gt                1694
_reflns_number_total             1729
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo7b00803_si_002.cif
_cod_data_source_block           cu-1707
_cod_original_sg_symbol_H-M      P212121
_cod_database_code               4032702