Effects of thionation and fluorination on cis-trans isomerization in tertiary amides: an investigation of N-alkylglycine (peptoid) rotamers.
Engel-Andreasen, Jens; Wich, Kathrine; Laursen, Jonas S.; Harris, Pernille; Olsen, Christian A.; The Journal of organic chemistry 80 (2015) 5415–5427; doi:10.1021/acs.joc.5b00048

data_4030996
_publ_section_title
;
 Effects of thionation and fluorination on cis-trans isomerization in
 tertiary amides: an investigation of N-alkylglycine (peptoid) rotamers.
;
_journal_issue                   11
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              5415
_journal_page_last               5427
_journal_paper_doi               10.1021/acs.joc.5b00048
_journal_volume                  80
_journal_year                    2015
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C18 H20 F2 N2 O S, C H Cl3'
_chemical_formula_sum            'C19 H21 Cl3 F2 N2 O S'
_chemical_formula_weight         469.79
_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
_atom_sites_solution_primary     iterative
_audit_creation_date             2014-12-12
_audit_creation_method
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Olex2 1.2
(compiled 2014.09.19 svn.r3010 for OlexSys, GUI svn.r4874)
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_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.1156(6)
_cell_length_b                   19.8520(12)
_cell_length_c                   12.9765(9)
_cell_measurement_reflns_used    4118
_cell_measurement_temperature    121(2)
_cell_measurement_theta_max      27.8210
_cell_measurement_theta_min      3.1420
_cell_volume                     2090.7(2)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.34 (release 22-05-2014 CrysAlis171 .NET)
(compiled May 22 2014,16:03:01)
;
_computing_data_collection
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.34 (release 22-05-2014 CrysAlis171 .NET)
(compiled May 22 2014,16:03:01)
;
_computing_data_reduction
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CrysAlisPro, Agilent Technologies,
Version 1.171.37.34 (release 22-05-2014 CrysAlis171 .NET)
(compiled May 22 2014,16:03:01)
;
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2008)'
_computing_structure_solution
;
Superflip (Palatinus & Chapuis, 2007;Palatinus & van der Lee, 2008;
Palatinus et al., 2012)
;
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      121(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_area_resol_mean 5.3073
_diffrn_detector_type            Atlas
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.863
_diffrn_measurement_details
;
  1 omega  -58.00   35.00   1.0000   74.5500
omega____ theta____ kappa____ phi______ frames
    -       10.7161  -73.0000 -144.0000 93

  2 omega  -47.00   -8.00   1.0000   74.5500
omega____ theta____ kappa____ phi______ frames
    -       10.7161  -57.0000  150.0000 39

  3 omega  -19.00   22.00   1.0000   74.5500
omega____ theta____ kappa____ phi______ frames
    -      -11.5754  -99.0000   90.0000 41
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Dual, Cu at zero, Atlas'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_UB_11      0.0819112000
_diffrn_orient_matrix_UB_12      -0.0047718000
_diffrn_orient_matrix_UB_13      -0.0176686000
_diffrn_orient_matrix_UB_21      -0.0080823000
_diffrn_orient_matrix_UB_22      0.0284398000
_diffrn_orient_matrix_UB_23      -0.0327118000
_diffrn_orient_matrix_UB_31      0.0294765000
_diffrn_orient_matrix_UB_32      0.0211023000
_diffrn_orient_matrix_UB_33      0.0400350000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0343
_diffrn_reflns_av_unetI/netI     0.0551
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.863
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            9826
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.840
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         29.536
_diffrn_reflns_theta_min         2.583
_diffrn_source                   'SuperNova (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.569
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.78455
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.34 (release 22-05-2014 CrysAlis171 .NET)
(compiled May 22 2014,16:03:01)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            colourless
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.493
_exptl_crystal_description       irregular
_exptl_crystal_F_000             968
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.402
_refine_diff_density_min         -0.758
_refine_diff_density_rms         0.103
_refine_ls_abs_structure_details
;
 Flack x determined using 1513 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.05(3)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.101
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     256
_refine_ls_number_reflns         4918
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.101
_refine_ls_R_factor_all          0.0741
_refine_ls_R_factor_gt           0.0609
_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^)+(0.1031P)^2^+1.1550P]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1738
_refine_ls_wR_factor_ref         0.1851
_reflns_Friedel_coverage         0.723
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.811
_reflns_number_gt                4143
_reflns_number_total             4918
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo5b00048_si_002.cif
_cod_data_source_block           compound_14
_cod_depositor_comments
'Adding full bibliography for 4030982--4030996.cif.'
_cod_database_code               4030996
_shelxl_version_number           2013-2
_chemical_oxdiff_formula         'C18 H20 F2 N2 O S'
_reflns_odcompleteness_completeness 99.76
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     26.32
_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:
 C1(H1), C7(H7), C19(H19)
2.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B)
2.c Aromatic/amide H refined with riding coordinates:
 C17(H17), C10(H10), C12(H12), C16(H16), C15(H15), C11(H11), C14(H14)
2.d Idealised Me refined as rotating group:
 C6(H6A,H6B,H6C), C8(H8A,H8B,H8C), C5(H5A,H5B,H5C)
;
_shelx_res_checksum              77406
_shelx_hkl_checksum              49177
_olex2_submission_special_instructions 'No special instructions were received'