A new N-type organic semiconductor synthesized by knoevenagel condensation of truxenone and ethyl cyanoacetate.
Zhang, Xin-Ran; Chao, Wei; Chuai, Yu-Tao; Ma, Yan; Hao, Rui; Zou, De-Chun; Wei, Yong-Ge; Wang, Yuan; Organic letters 8 (2006) 2563–2566; doi:10.1021/ol060756o

data_1506002
_publ_section_title
;
 A new N-type organic semiconductor synthesized by knoevenagel
 condensation of truxenone and ethyl cyanoacetate.
;
_journal_issue                   12
_journal_name_full               'Organic letters'
_journal_page_first              2563
_journal_page_last               2566
_journal_paper_doi               10.1021/ol060756o
_journal_volume                  8
_journal_year                    2006
_chemical_formula_sum            'C42 H27 N3 O6'
_chemical_formula_weight         669.66
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 93.98(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.4420(19)
_cell_length_b                   14.643(3)
_cell_length_c                   23.704(5)
_cell_measurement_reflns_used    23158
_cell_measurement_temperature    180(2)
_cell_measurement_theta_max      25.028
_cell_measurement_theta_min      3.395
_cell_volume                     3269.4(12)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor, 1997)'
_computing_data_collection       'KappaCCD (Nonius B. V., 1998)'
_computing_data_reduction
'HKL Denzo (Otwinowski & Minor, 1997) & maXus (Mackay et al., 1998)'
_computing_molecular_graphics    'Bruker SHELXTL V5.1 (Sheldrick, 1998)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      180(2)
_diffrn_detector_area_resol_mean 0.76
_diffrn_measured_fraction_theta_full 0.975
_diffrn_measured_fraction_theta_max 0.975
_diffrn_measurement_device_type  'NONIUS KappaCCD'
_diffrn_measurement_method       CCD
_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  0.1676
_diffrn_reflns_av_sigmaI/netI    0.2249
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -28
_diffrn_reflns_number            33329
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.45
_exptl_absorpt_coefficient_mu    0.092
_exptl_absorpt_correction_T_max  0.9954
_exptl_absorpt_correction_T_min  0.9684
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.361
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'thin plate'
_exptl_crystal_F_000             1392
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.211
_refine_diff_density_min         -0.225
_refine_diff_density_rms         0.045
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.865
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     473
_refine_ls_number_reflns         5629
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.865
_refine_ls_R_factor_all          0.2092
_refine_ls_R_factor_gt           0.0592
_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^)+(0.0414P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0884
_refine_ls_wR_factor_ref         0.1152
_reflns_number_gt                2203
_reflns_number_total             5629
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol060756osi20060328_110917.cif
_cod_data_source_block           last
_cod_original_cell_volume        3269.3(11)
_cod_original_sg_symbol_H-M      'P 2(1)/n'
_cod_database_code               1506002