Synthesis and Characterization of Thieno[3,4-b]pyrazine-Based Terthienyls: Tunable Precursors for Low Band Gap Conjugated Materials
Ryan L. Schwiderski; Seth C. Rasmussen; Journal of Organic Chemistry 78 (2013) 5453–5462; doi:10.1021/jo400577q

data_4028296
_publ_contact_author_email       seth.rasmussen@ndsu.edu
_publ_contact_author_fax         701-231-8831
_publ_contact_author_name        'Seth C. Rasmussen'
_publ_contact_author_phone       701-231-8747
_publ_section_title
;
 Synthesis and Characterization of Thieno[3,4-b]pyrazine-Based
 Terthienyls: Tunable Precursors for Low Band Gap Conjugated Materials
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              5453
_journal_page_last               5462
_journal_paper_doi               10.1021/jo400577q
_journal_volume                  78
_journal_year                    2013
_chemical_formula_moiety         'C14 H8 N2 O2 S3, C H4 O'
_chemical_formula_sum            'C15 H12 N2 O3 S3'
_chemical_formula_weight         364.45
_chemical_melting_point          489
_chemical_name_systematic
;
 5,7-Bis(2-thienyl)thieno[3,4-b]pyrazine-2,3(1H,4H)-dione
;
_space_group_IT_number           14
_space_group_name_Hall           '-P 2ybc'
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 115.4920(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   11.9818(3)
_cell_length_b                   13.2018(3)
_cell_length_c                   10.9061(3)
_cell_measurement_reflns_used    8683
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.87
_cell_measurement_theta_min      2.58
_cell_volume                     1557.19(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\f and \w scans'
_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  0.0243
_diffrn_reflns_av_sigmaI/netI    0.0173
_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       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            20415
_diffrn_reflns_theta_full        27.91
_diffrn_reflns_theta_max         27.91
_diffrn_reflns_theta_min         1.88
_exptl_absorpt_coefficient_mu    0.491
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6768
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Acta Cryst (1995). A51, 33-38'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.555
_exptl_crystal_description       plate
_exptl_crystal_F_000             752
_exptl_crystal_size_max          0.36
_exptl_crystal_size_mid          0.25
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.720
_refine_diff_density_min         -0.574
_refine_diff_density_rms         0.084
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     210
_refine_ls_number_reflns         3733
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0480
_refine_ls_R_factor_gt           0.0427
_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^)+(0.0668P)^2^+1.9316P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1209
_refine_ls_wR_factor_ref         0.1256
_reflns_number_gt                3316
_reflns_number_total             3733
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo400577q_si_002_2.cif
_cod_data_source_block           mo_rxs5_0ma
_cod_database_code               4028296