Direct Access to 2-Aryl Substituted Pyrrolinium Salts for Carbon Centre Based Radicals without Pyrrolidine-2-Ylidene alias cyclic(Alkyl)(Amino)Carbene (CAAC) as a Precursor
Mandal, Debdeep; Sobottka, Sebastian; Dolai, Ramapada; Maiti, Avijit; Dhara, Debabrata; Kalita, Pankaj; Narayanan, Ramakirushnan Surya; Chandrasekhar, Vadapalli; Sarkar, Biprajit; Jana, Anukul; Chemical Science  (2019) –; doi:10.1039/C8SC05477K

data_1550679
_publ_section_title
;
 Direct Access to 2-Aryl Substituted Pyrrolinium Salts for Carbon Centre
 Based Radicals without Pyrrolidine-2-Ylidene alias
 cyclic(Alkyl)(Amino)Carbene (CAAC) as a Precursor
;
_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/C8SC05477K
_journal_year                    2019
_chemical_formula_moiety         'C18 H28 N, C F3 O3 S'
_chemical_formula_sum            'C19 H28 F3 N O3 S'
_chemical_formula_weight         407.48
_space_group_crystal_system      monoclinic
_space_group_IT_number           15
_space_group_name_Hall           '-C 2yc'
_space_group_name_H-M_alt        'C 1 2/c 1'
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     dual
_audit_creation_date             2018-04-29
_audit_creation_method
;
Olex2 1.2
(compiled 2018.04.26 svn.r3504 for OlexSys, GUI svn.r5492)
;
_audit_update_record
;
2018-09-16 deposited with the CCDC.    2019-02-28 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 101.860(4)
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   34.1987(12)
_cell_length_b                   8.2153(3)
_cell_length_c                   15.7716(6)
_cell_measurement_reflns_used    16217
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.0690
_cell_measurement_theta_min      3.1350
_cell_volume                     4336.5(3)
_computing_cell_refinement       'CrysAlisPro 1.171.39.29d (Rigaku OD, 2017)'
_computing_data_collection       'CrysAlisPro 1.171.39.29d (Rigaku OD, 2017)'
_computing_data_reduction        'CrysAlisPro 1.171.39.29d (Rigaku OD, 2017)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector                 'CCD plate'
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  t~exp~   \w     \q     \k     \f   Frames
  1  \w     11.00  36.00   0.50    6.13    --    7.20  46.00  64.00   50
  2  \w    -60.00 -35.00   0.50    6.13    --   -7.60 -46.00 -84.00   50
  3  \w     -4.00  21.00   0.50    6.13    --   -7.60  46.00  64.00   50
  4  \w     50.00  96.00   0.50    6.13    --    7.20  77.00   0.00   92
  5  \w    -80.00  37.00   0.50    6.13    --    7.20 -57.00-180.00  234
  6  \w     51.00  93.00   0.50    6.13    --    7.20  77.00-120.00   84
  7  \w    -63.00  40.00   0.50    6.13    --    7.20 -82.00 150.00  206
  8  \w    -35.00  -6.00   0.50    6.13    --   -7.60 -82.00  60.00   58
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'XtaLAB AFC12 (RINC): Kappa single'
_diffrn_measurement_method       '\w scans'
_diffrn_orient_matrix_type
'CrysAlisPro convention (1999,Acta A55,543-557)'
_diffrn_orient_matrix_UB_11      -0.0183217000
_diffrn_orient_matrix_UB_12      -0.0488855000
_diffrn_orient_matrix_UB_13      -0.0167005000
_diffrn_orient_matrix_UB_21      -0.0414068000
_diffrn_orient_matrix_UB_22      0.0082938000
_diffrn_orient_matrix_UB_23      0.0048505000
_diffrn_orient_matrix_UB_31      -0.0078296000
_diffrn_orient_matrix_UB_32      0.0706804000
_diffrn_orient_matrix_UB_33      -0.0121122000
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0344
_diffrn_reflns_av_unetI/netI     0.0294
_diffrn_reflns_Laue_measured_fraction_full 0.998
_diffrn_reflns_Laue_measured_fraction_max 0.997
_diffrn_reflns_limit_h_max       42
_diffrn_reflns_limit_h_min       -34
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            23027
_diffrn_reflns_point_group_measured_fraction_full 0.998
_diffrn_reflns_point_group_measured_fraction_max 0.997
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.498
_diffrn_reflns_theta_min         2.553
_diffrn_source                   'fine-focus sealed X-ray tube'
_diffrn_source_type              'Enhance (Mo) X-ray Source'
_exptl_absorpt_coefficient_mu    0.192
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.35771
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.39.29d (Rigaku Oxford Diffraction, 2017)
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    1.248
_exptl_crystal_description       plate
_exptl_crystal_F_000             1728
_exptl_crystal_size_max          0.89
_exptl_crystal_size_mid          0.773
_exptl_crystal_size_min          0.235
_refine_diff_density_max         0.508
_refine_diff_density_min         -0.378
_refine_diff_density_rms         0.055
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     251
_refine_ls_number_reflns         4493
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0467
_refine_ls_R_factor_gt           0.0407
_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^)+(0.0501P)^2^+5.2914P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1050
_refine_ls_wR_factor_ref         0.1087
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3930
_reflns_number_total             4493
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c8sc05477k2.cif
_cod_data_source_block           aj0284
_cod_database_code               1550679
_shelx_shelxl_version_number     2017/1
_chemical_oxdiff_formula         C20H24F3NO3S
_shelx_estimated_absorpt_t_max   0.956
_shelx_estimated_absorpt_t_min   0.848
_reflns_odcompleteness_completeness 99.63
_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:
 C12(H12)
2.b Secondary CH2 refined with riding coordinates:
 C3(H3A,H3B)
2.c Aromatic/amide H refined with riding coordinates:
 C6(H6), C10(H10), C7(H7), C9(H9)
2.d Idealised Me refined as rotating group:
 C15(H15A,H15B,H15C), C14(H14A,H14B,H14C), C13(H13A,H13B,H13C), C16(H16A,H16B,
 H16C), C18(H18A,H18B,H18C), C17(H17A,H17B,H17C), C11(H11A,H11B,H11C)
;
_shelx_res_checksum              43215
_shelx_fab_checksum              63961
_olex2_submission_special_instructions 'No special instructions were received'
_oxdiff_exptl_absorpt_empirical_details
;
Empirical correction (ABSPACK) includes:
- Absorption correction using spherical harmonics
- Frame scaling
;
_oxdiff_exptl_absorpt_empirical_full_max 1.627
_oxdiff_exptl_absorpt_empirical_full_min 0.415