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_4030982
_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 H22 N2 O2'
_chemical_formula_sum            'C18 H22 N2 O2'
_chemical_formula_weight         298.37
_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     direct
_audit_creation_date             2014-09-22
_audit_creation_method
;
Olex2 1.2
(compiled 2014.08.28 svn.r2986 for OlexSys, GUI svn.r4866)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   9.37265(13)
_cell_length_b                   9.64096(14)
_cell_length_c                   17.4564(2)
_cell_measurement_reflns_used    4390
_cell_measurement_temperature    119.99(10)
_cell_measurement_theta_max      73.8700
_cell_measurement_theta_min      5.0680
_cell_volume                     1577.38(4)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.33 (release 27-03-2014 CrysAlis171 .NET)
(compiled Mar 27 2014,17:12:48)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.33 (release 27-03-2014 CrysAlis171 .NET)
(compiled Mar 27 2014,17:12:48)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.33 (release 27-03-2014 CrysAlis171 .NET)
(compiled Mar 27 2014,17:12:48)
;
_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    'ShelXS (Sheldrick, 2008)'
_diffrn_ambient_environment      N~2~
_diffrn_ambient_temperature      119.99(10)
_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 0.983
_diffrn_measurement_details
;
  1 omega    1.00   54.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -       41.0554  -99.0000  -60.0000 53

  2 omega   35.00   98.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -      106.6310  -45.0000   30.0000 63

  3 omega   53.00   87.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -      106.6310  -45.0000  -60.0000 34

  4 omega   50.00   78.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -      106.6310  -30.0000 -180.0000 28

  5 omega   86.00  177.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -      106.6310   61.0000 -180.0000 91

  6 omega   48.00   98.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -      106.6310  -45.0000   90.0000 50

  7 omega   45.00  107.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -      106.6310  -95.0000   60.0000 62

  8 omega   30.00   79.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -      106.6310  -30.0000  150.0000 49

  9 omega  -51.00   -8.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -      -41.0554  125.0000  -30.0000 43

 10 omega -105.00  -17.00   1.0000    1.0000
omega____ theta____ kappa____ phi______ frames
    -      -41.0554  -38.0000  -90.0000 88
;
_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      0.0821172000
_diffrn_orient_matrix_UB_12      0.0830687000
_diffrn_orient_matrix_UB_13      -0.0611416000
_diffrn_orient_matrix_UB_21      0.1018267000
_diffrn_orient_matrix_UB_22      -0.1235795000
_diffrn_orient_matrix_UB_23      -0.0118218000
_diffrn_orient_matrix_UB_31      -0.0995498000
_diffrn_orient_matrix_UB_32      -0.0578532000
_diffrn_orient_matrix_UB_33      -0.0625565000
_diffrn_radiation_monochromator  mirror
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0222
_diffrn_reflns_av_unetI/netI     0.0292
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.983
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            5417
_diffrn_reflns_point_group_measured_fraction_full 0.999
_diffrn_reflns_point_group_measured_fraction_max 0.971
_diffrn_reflns_theta_full        67.684
_diffrn_reflns_theta_max         74.042
_diffrn_reflns_theta_min         5.067
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_type              'SuperNova (Cu) X-ray Source'
_exptl_absorpt_coefficient_mu    0.656
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.72920
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.37.33 (release 27-03-2014 CrysAlis171 .NET)
(compiled Mar 27 2014,17:12:48)
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    1.256
_exptl_crystal_description       block
_exptl_crystal_F_000             640
_exptl_crystal_size_max          0.346
_exptl_crystal_size_mid          0.266
_exptl_crystal_size_min          0.216
_refine_diff_density_max         0.150
_refine_diff_density_min         -0.194
_refine_diff_density_rms         0.042
_refine_ls_abs_structure_details
;
 Flack x determined using 1231 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons and Flack (2004), Acta Cryst. A60, s61).
;
_refine_ls_abs_structure_Flack   0.23(11)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.052
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     203
_refine_ls_number_reflns         3102
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.052
_refine_ls_R_factor_all          0.0347
_refine_ls_R_factor_gt           0.0337
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
;
 w=1/[\s^2^(Fo^2^)+(0.0547P)^2^+0.1180P]
 where P=(Fo^2^+2Fc^2^)/3
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0863
_refine_ls_wR_factor_ref         0.0876
_reflns_Friedel_coverage         0.713
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     0.954
_reflns_number_gt                3008
_reflns_number_total             3102
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            jo5b00048_si_002.cif
_cod_data_source_block           compound_3b
_cod_depositor_comments
'Adding full bibliography for 4030982--4030996.cif.'
_cod_database_code               4030982
_shelxl_version_number           2013-2
_chemical_oxdiff_formula         'C18 H22 N2 O2'
_reflns_odcompleteness_completeness 99.88
_reflns_odcompleteness_iscentric 1
_reflns_odcompleteness_theta     66.97
_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:
 C7(H7)
2.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B)
2.c Aromatic/amide H refined with riding coordinates:
 C11(H11), C15(H15), C12(H12), C10(H10), C18(H18), C16(H16), C17(H17)
2.d Idealised Me refined as rotating group:
 C5(H5A,H5B,H5C), C8(H8A,H8B,H8C), C1(H1A,H1B,H1C), C6(H6A,H6B,H6C)
;
_shelx_res_checksum              7271
_shelx_hkl_checksum              76970
_olex2_submission_special_instructions 'No special instructions were received'