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_1554833
_publ_section_title
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 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         'C21 H25 N3'
_chemical_formula_sum            'C21 H25 N3'
_chemical_formula_weight         319.44
_chemical_name_systematic
; 
 (Z)-N-(1-(1H-benzo[d]imidazol-1-yl)-2,2-dimethylpropylidene)aniline 
;
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                93.38(1)
_cell_angle_beta                 95.73(1)
_cell_angle_gamma                105.20(1)
_cell_formula_units_Z            2
_cell_length_a                   8.610(1)
_cell_length_b                   9.179(1)
_cell_length_c                   11.835(1)
_cell_measurement_reflns_used    123
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      25.0
_cell_measurement_theta_min      2.5
_cell_volume                     894.57(17)
_computing_cell_refinement       EVALCCD
_computing_data_collection       Collect
_computing_data_reduction        EVALCCD
_computing_molecular_graphics    XP
_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 0.986
_diffrn_measured_fraction_theta_max 0.986
_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  0.0644
_diffrn_reflns_av_sigmaI/netI    0.0700
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            9296
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.01
_exptl_absorpt_coefficient_mu    0.071
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.186
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             344
_exptl_crystal_size_max          0.48
_exptl_crystal_size_mid          0.24
_exptl_crystal_size_min          0.12
_refine_diff_density_max         0.396
_refine_diff_density_min         -0.411
_refine_diff_density_rms         0.093
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.037
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     220
_refine_ls_number_reflns         3108
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.037
_refine_ls_R_factor_all          0.1082
_refine_ls_R_factor_gt           0.0878
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1497P)^2^+0.5923P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2187
_refine_ls_wR_factor_ref         0.2370
_reflns_number_gt                2357
_reflns_number_total             3108
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol5b00339_si_002.cif
_cod_data_source_block           jcs005_compound_8a
_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 
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_cod_original_cell_volume        894.57(16)
_cod_database_code               1554833