Preparation and Characterization of π-Stacking Quinodimethane Oligothiophenes. Predicting Semiconductor Behavior and Bandwidths from Crystal Structures and Molecular Orbital Calculations
Daron E. Janzen; Michael W. Burand; Paul C. Ewbank; Ted M. Pappenfus; Hiroyuki Higuchi; Demetrio A. da Silva Filho; Victor G. Young; Jean-Luc Brédas; Kent R. Mann; Journal of the American Chemical Society 126 (2004) 15295–15308; doi:10.1021/ja0484597

data_4113207
_publ_section_title
;
 Preparation and Characterization of \p-Stacking Quinodimethane
 Oligothiophenes. Predicting Semiconductor Behavior and Bandwidths from
 Crystal Structures and Molecular Orbital Calculations
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15295
_journal_page_last               15308
_journal_paper_doi               10.1021/ja0484597
_journal_volume                  126
_journal_year                    2004
_chemical_formula_moiety         'C30 H30 N4 S3'
_chemical_formula_sum            'C30 H30 N4 S3'
_chemical_formula_weight         542.76
_chemical_name_common            03138
_chemical_name_systematic
; 
 ? 
;
_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                95.876(6)
_cell_angle_beta                 98.489(6)
_cell_angle_gamma                97.492(6)
_cell_formula_units_Z            2
_cell_length_a                   7.951(3)
_cell_length_b                   13.212(4)
_cell_length_c                   13.936(4)
_cell_measurement_reflns_used    765
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      21.22
_cell_measurement_theta_min      2.79
_cell_volume                     1424.5(8)
_computing_cell_refinement       'SAINT, Bruker'
_computing_data_collection       'SMART, Bruker'
_computing_data_reduction        'SAINT, Bruker'
_computing_molecular_graphics    'SHELXTL, Bruker'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Siemens SMART Platform CCD'
_diffrn_measurement_method       'area detector, omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0745
_diffrn_reflns_av_sigmaI/netI    0.1093
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            14280
_diffrn_reflns_theta_full        25.07
_diffrn_reflns_theta_max         25.07
_diffrn_reflns_theta_min         1.49
_exptl_absorpt_coefficient_mu    0.286
_exptl_absorpt_correction_T_max  1.000000
_exptl_absorpt_correction_T_min  0.890299
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS, R. Blessing, 1995'
_exptl_crystal_colour            'metallic green'
_exptl_crystal_density_diffrn    1.265
_exptl_crystal_density_meas      0
_exptl_crystal_description       plate
_exptl_crystal_F_000             572
_exptl_crystal_size_max          0.13
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.01
_refine_diff_density_max         0.204
_refine_diff_density_min         -0.367
_refine_diff_density_rms         0.050
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.963
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     353
_refine_ls_number_reflns         5062
_refine_ls_number_restraints     9
_refine_ls_restrained_S_all      0.962
_refine_ls_R_factor_all          0.1434
_refine_ls_R_factor_gt           0.0503
_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^)+(0.0488P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0947
_refine_ls_wR_factor_ref         0.1215
_reflns_number_gt                2520
_reflns_number_total             5062
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0484597si20040317_020924.cif
_cod_data_source_block           03138m
_cod_original_cell_volume        1424.6(8)
_cod_database_code               4113207