Poly(2,3-dihexylthieno[3,4-b]pyrazine) via GRIM Polymerization: Simple Preparation of a Solution Processable, Low-Band-Gap Conjugated Polymer
Wen, Li; Duck, Benjamin C.; Dastoor, Paul C.; Rasmussen, Seth C.; Macromolecules 41 (2008) 4576–; doi:10.1021/ma801057s

data_1504436
_publ_section_title
;
 Poly(2,3-dihexylthieno[3,4-b]pyrazine) via GRIM Polymerization: Simple
 Preparation of a Solution Processable, Low-Band-Gap Conjugated Polymer
;
_journal_issue                   13
_journal_name_full               Macromolecules
_journal_page_first              4576
_journal_paper_doi               10.1021/ma801057s
_journal_volume                  41
_journal_year                    2008
_chemical_formula_moiety         'C18 H28 N2 S'
_chemical_formula_sum            'C18 H28 N2 S'
_chemical_formula_weight         304.50
_chemical_melting_point          54
_chemical_name_common            2,3-dihexylthieno[3,4-b]pyrazine
_chemical_name_systematic
;
 2,3-dihexylthieno[3,4-b]pyrazine
;
_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                86.94(3)
_cell_angle_beta                 77.72(3)
_cell_angle_gamma                88.07(3)
_cell_formula_units_Z            2
_cell_length_a                   6.8939(14)
_cell_length_b                   10.021(2)
_cell_length_c                   13.685(3)
_cell_measurement_reflns_used    4215
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.80
_cell_measurement_theta_min      2.04
_cell_volume                     922.2(3)
_computing_cell_refinement       'Bruker Smart'
_computing_data_collection       'Bruker Smart'
_computing_data_reduction        'Bruker Saintplus'
_computing_molecular_graphics    'Ortep3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGx publication Routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker 1K CCD Diffractometer'
_diffrn_measurement_method       'Phi plus Omega Scan'
_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  0.0937
_diffrn_reflns_av_sigmaI/netI    0.1037
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            17599
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         2.04
_exptl_absorpt_coefficient_mu    0.173
_exptl_absorpt_correction_T_max  0.9730
_exptl_absorpt_correction_T_min  0.9650
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS v 2.03 (Sheldrick, 1997)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.097
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             332
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.252
_refine_diff_density_min         -0.205
_refine_diff_density_rms         0.037
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.005
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     192
_refine_ls_number_reflns         3619
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.005
_refine_ls_R_factor_all          0.1679
_refine_ls_R_factor_gt           0.0552
_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^)+(0.0440P)^2^+0.5541P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1238
_refine_ls_wR_factor_ref         0.1811
_reflns_number_gt                1545
_reflns_number_total             3619
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ma801057s-file004.cif
_cod_data_source_block           C6TP
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'TRICLINIC' changed to 'triclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from
2010-06-29.

'_exptl_absorpt_correction_type' value 'MULTI-SCAN'
changed to 'multi-scan' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from
2010-06-29.

'_refine_ls_hydrogen_treatment' value 'CONSTR' changed
to 'constr' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               1504436