N, N-bis-(dimethylfluorosilylmethyl)amides of N-organosulfonylproline and sarcosine: synthesis, structure, stereodynamic behaviour and in silico studies
Nikolin, Alexey Aleksandrovich; Kramarova, Eugenia; Shipov, Aleksander; Baukov, Yuri; Negrebetsky, Vadim V.; Dmitry, Arkhipov E.; Korlyukov, Aleksander; Lagunin, Alexey; Bylikin, Sergey; Bassindale, Alan R.; Taylor, P. G.; RSC Adv.  (2016) –; doi:10.1039/C6RA14450K

data_7226040
_publ_section_title
;
 N, N-bis-(dimethylfluorosilylmethyl)amides of N-organosulfonylproline and
 sarcosine: synthesis, structure, stereodynamic behaviour and in silico
 studies
;
_journal_name_full               'RSC Adv.'
_journal_paper_doi               10.1039/C6RA14450K
_journal_year                    2016
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C12 H26 N2 O4 S Si2'
_chemical_formula_sum            'C12 H26 N2 O4 S Si2'
_chemical_formula_weight         350.59
_chemical_melting_point          395.5(15)
_chemical_name_systematic
(S)-(1-(methylsulfonyl)pyrrolidin-2-yl)(2,2,6,6-tetramethyl-1,4,2,6-oxazadisilinan-4-yl)methanone
_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             2015-04-08
_audit_creation_method
;
Olex2 1.2
(compiled 2015.01.26 svn.r3150 for OlexSys, GUI svn.r4998)
;
_audit_update_record
;
2015-04-14 deposited with the CCDC.
2016-07-25 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   9.6000(5)
_cell_length_b                   14.2422(7)
_cell_length_c                   27.0844(14)
_cell_measurement_reflns_used    9703
_cell_measurement_temperature    100.0
_cell_measurement_theta_max      30.45
_cell_measurement_theta_min      2.25
_cell_volume                     3703.1(3)
_computing_cell_refinement       'SAINT v7.68A (Bruker, 2007)'
_computing_data_collection       'APEX2 (Bruker, 2007)'
_computing_data_reduction        'SAINT v7.68A (Bruker, 2007)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'XL (Sheldrick, 2008)'
_computing_structure_solution    'XS (Sheldrick, 2008)'
_diffrn_ambient_temperature      100.0
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0355
_diffrn_reflns_av_unetI/netI     0.0293
_diffrn_reflns_Laue_measured_fraction_full 0.999
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       38
_diffrn_reflns_limit_l_min       -38
_diffrn_reflns_number            50072
_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         30.514
_diffrn_reflns_theta_min         2.075
_exptl_absorpt_coefficient_mu    0.319
_exptl_absorpt_correction_T_max  0.7461
_exptl_absorpt_correction_T_min  0.6384
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
SADABS-2008/1 (Bruker,2001) was used for absorption correction.
wR2(int) was 0.0894 before and 0.0500 after correction.
The Ratio of minimum to maximum transmission is 0.8556.
The \l/2 correction factor is 0.0015.
;
_exptl_crystal_colour            'clear colourless'
_exptl_crystal_colour_lustre     clear
_exptl_crystal_colour_primary    colourless
_exptl_crystal_density_diffrn    1.258
_exptl_crystal_description       prism
_exptl_crystal_F_000             1504
_exptl_crystal_recrystallization_method
'Re-crystallisation from solvent: heptane/benzene'
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.19
_refine_diff_density_max         0.556
_refine_diff_density_min         -0.323
_refine_diff_density_rms         0.053
_refine_ls_abs_structure_details
;
 Flack x determined using 4518 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.027(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     389
_refine_ls_number_reflns         11308
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0384
_refine_ls_R_factor_gt           0.0344
_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^)+(0.0349P)^2^+1.3243P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0775
_refine_ls_wR_factor_ref         0.0793
_reflns_Friedel_coverage         0.806
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                10588
_reflns_number_total             11308
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6ra14450k2.cif
_cod_data_source_block           9411a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_chemical_melting_point' value '394-397' was changed to '395.5(15)'
- the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_database_code               7226040
_shelxl_version_number           2014/6
_shelx_estimated_absorpt_t_max   0.942
_shelx_estimated_absorpt_t_min   0.927
_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:
 C8(H8), C20(H20)
2.b Secondary CH2 refined with riding coordinates:
 C5(H5A,H5B), C6(H6A,H6B), C9(H9A,H9B), C10(H10A,H10B), C11(H11A,H11B),
 C17(H17A,H17B), C18(H18A,H18B), C21(H21A,H21B), C22(H22A,H22B), C23(H23A,H23B)
2.c Idealised Me refined as rotating group:
 C1(H1A,H1B,H1C), C2(H2A,H2B,H2C), C3(H3A,H3B,H3C), C4(H4A,H4B,H4C), C12(H12A,
 H12B,H12C), C13(H13A,H13B,H13C), C14(H14A,H14B,H14C), C15(H15A,H15B,H15C),
 C16(H16A,H16B,H16C), C24(H24A,H24B,H24C)
;
_shelx_res_checksum              68116
_shelx_hkl_checksum              97394
_olex2_submission_special_instructions 'No special instructions were received'