Base-stabilized nitrilium ions as convenient imine synthons.
van Dijk, Tom; Bakker, Martijn S.; Holtrop, Flip; Nieger, Martin; Slootweg, J. Chris; Lammertsma, Koop; Organic letters 17 (2015) 1461–1464; doi:10.1021/acs.orglett.5b00339

data_1554830
_publ_section_title
;
 Base-stabilized nitrilium ions as convenient imine synthons.
;
_journal_issue                   6
_journal_name_full               'Organic letters'
_journal_page_first              1461
_journal_page_last               1464
_journal_paper_doi               10.1021/acs.orglett.5b00339
_journal_volume                  17
_journal_year                    2015
_chemical_formula_moiety         'C19 H25 N2, C F3 O3 S'
_chemical_formula_sum            'C20 H25 F3 N2 O3 S'
_chemical_formula_weight         430.48
_chemical_name_systematic
; 
 (Z)-1-(1-(mesitylimino)-2,2-dimethylpropyl)pyridin-1-ium triflate 
;
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_space_group_name_H-M_alt        'P 1 21/c 1'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 102.44(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.128(1)
_cell_length_b                   15.344(3)
_cell_length_c                   16.979(2)
_cell_measurement_reflns_used    140
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      2.5
_cell_volume                     2067.8(5)
_computing_cell_refinement       EVALCCD
_computing_data_collection       Collect
_computing_data_reduction        EVALCCD
_computing_molecular_graphics    Shelxtl
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Bruker-Nonius KappaCCD'
_diffrn_measurement_method       'rotation in phi and omega, 2 deg.'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0355
_diffrn_reflns_av_sigmaI/netI    0.0217
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            40992
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.92
_exptl_absorpt_coefficient_mu    0.207
_exptl_absorpt_correction_T_max  0.9703
_exptl_absorpt_correction_T_min  0.8474
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 2008)'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.383
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             904
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.563
_refine_diff_density_min         -0.511
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.077
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     320
_refine_ls_number_reflns         4737
_refine_ls_number_restraints     198
_refine_ls_restrained_S_all      1.096
_refine_ls_R_factor_all          0.0583
_refine_ls_R_factor_gt           0.0445
_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^)+(0.0470P)^2^+1.4230P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1067
_refine_ls_wR_factor_ref         0.1152
_reflns_number_gt                3868
_reflns_number_total             4737
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5b00339_si_002.cif
_cod_data_source_block           jcs008_compound_4a
_cod_depositor_comments
;
The following automatic conversions were performed:

data item '_exptl_crystal_density_meas' value 'none' was changed to
'?' -- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               1554830