Dicyanobenzene and dicyanopyrazine derived X-shaped charge-transfer chromophores: comparative and structure-property relationship study.
Dokládalová, L; Bureš, F; Kuznik, W.; Kityk, I. V.; Wojciechowski, A.; Mikysek, T.; Almonasy, N.; Ramaiyan, M.; Padělková, Z; Kulhánek, J; Ludwig, M.; Organic & biomolecular chemistry 12 (2014) 5517–5527; doi:10.1039/c4ob00901k

data_7153923
_publ_section_title
;
 Dicyanobenzene and dicyanopyrazine derived X-shaped charge-transfer
 chromophores: comparative and structure-property relationship study.
;
_journal_issue                   29
_journal_name_full               'Organic &amp; biomolecular chemistry'
_journal_page_first              5517
_journal_page_last               5527
_journal_paper_doi               10.1039/c4ob00901k
_journal_volume                  12
_journal_year                    2014
_chemical_formula_moiety         '2(C24 H22 N4), C H2 Cl2'
_chemical_formula_sum            'C24.5 H23 Cl N4'
_chemical_formula_weight         408.92
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_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                98.900(6)
_cell_angle_beta                 107.234(5)
_cell_angle_gamma                108.859(4)
_cell_formula_units_Z            4
_cell_length_a                   12.1480(5)
_cell_length_b                   13.7149(6)
_cell_length_c                   14.8781(12)
_cell_measurement_reflns_used    43783
_cell_measurement_temperature    150(1)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      1
_cell_volume                     2152.7(3)
_computing_cell_refinement       'COLLECT and DENZO'
_computing_data_collection
'COLLECT (Hooft, 1998) and DENZO (Otwinowski & Minor, 1997)'
_computing_data_reduction        'COLLECT and DENZO'
_computing_molecular_graphics    'PLATON (Spek, 2003)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      150(1)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Bruker Nonius KappaCCD area detector'
_diffrn_measurement_method       '\f and \w scans to fill the Ewald sphere'
_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  0.0460
_diffrn_reflns_av_sigmaI/netI    0.0298
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            43692
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         1.63
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.196
_exptl_absorpt_correction_T_max  0.964
_exptl_absorpt_correction_T_min  0.934
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
;
Gaussian integration (Coppens, 1970)
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.262
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             860
_exptl_crystal_size_max          0.42
_exptl_crystal_size_mid          0.39
_exptl_crystal_size_min          0.37
_refine_diff_density_max         1.095
_refine_diff_density_min         -1.003
_refine_diff_density_rms         0.052
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.084
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     532
_refine_ls_number_reflns         9765
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.084
_refine_ls_R_factor_all          0.0725
_refine_ls_R_factor_gt           0.0513
_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^)+(0.0445P)^2^+1.9075P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1166
_refine_ls_wR_factor_ref         0.1341
_reflns_number_gt                7658
_reflns_number_total             9765
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c4ob00901k2.cif
_cod_data_source_block           shelxl
_cod_depositor_comments
'Adding full bibliography for 7153922--7153923.cif.'
_cod_database_code               7153923