1,3,5-Triazapentadienes by Nucleophilic Addition to 1,3- and 1,4-Dinitriles-Sterically Constrained Examples by Incorporation into Cyclic Peripheries: Synthesis, Aggregation, and Photophysical Properties.
Wrobel, Agnes Johanna; Lucchesi, Ralph; Wibbeling, Birgit; Daniliuc, Constantin-Gabriel; Fröhlich, Roland; Würthwein, Ernst-Ulrich; The Journal of organic chemistry 81 (2016) 2849–2863; doi:10.1021/acs.joc.6b00126

data_4031947
_publ_section_title
;
 1,3,5-Triazapentadienes by Nucleophilic Addition to 1,3- and
 1,4-Dinitriles-Sterically Constrained Examples by Incorporation into
 Cyclic Peripheries: Synthesis, Aggregation, and Photophysical Properties.
;
_journal_issue                   7
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              2849
_journal_page_last               2863
_journal_paper_doi               10.1021/acs.joc.6b00126
_journal_volume                  81
_journal_year                    2016
_chemical_formula_sum            'C20 H22 N4'
_chemical_formula_weight         318.42
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_hydrogens   'at N2 from difmap, others geom'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 91.3460(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   16.8777(4)
_cell_length_b                   9.1711(2)
_cell_length_c                   21.9473(6)
_cell_measurement_reflns_used    4128
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      27.88
_cell_measurement_theta_min      4.08
_cell_volume                     3396.22(14)
_computing_cell_refinement       'Collect (Nonius B.V., 1998)'
_computing_data_collection       'Collect (Nonius B.V., 1998)'
_computing_data_reduction        'Denzo-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'XP (BrukerAXS, 2000)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.946
_diffrn_measured_fraction_theta_max 0.946
_diffrn_measurement_device_type  'Nonius KappaCCD APEXII'
_diffrn_measurement_method       '\w and \f scans'
_diffrn_radiation_monochromator  'Montel mirror'
_diffrn_radiation_source         'rotating anode Nonius FR591'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.041
_diffrn_reflns_av_sigmaI/netI    0.0267
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            7944
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         4.25
_exptl_absorpt_coefficient_mu    0.076
_exptl_absorpt_correction_T_max  0.9925
_exptl_absorpt_correction_T_min  0.9776
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'denzo (Otwinowski, Borek, Majewski & Minor, 2003)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.245
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1360
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.141
_refine_diff_density_min         -0.146
_refine_diff_density_rms         0.029
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.086
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     226
_refine_ls_number_reflns         2836
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.086
_refine_ls_R_factor_all          0.0573
_refine_ls_R_factor_gt           0.0510
_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^)+(0.0389P)^2^+3.3473P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1192
_refine_ls_wR_factor_ref         0.1257
_reflns_number_gt                2543
_reflns_number_total             2836
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo6b00126_si_010.cif
_cod_data_source_block           wue5589
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               4031947