The effect of hexyl side chains on molecular conformations, crystal packing, and charge transport of oligothiophenes
Benjamin P. Cherniawski; Steven A. Lopez; Edmund K. Burnett; Ilhan Yavuz; Lei Zhang; Sean R. Parkin; Kendall N. Houk; Alejandro L. Briseno; Journal of Materials Chemistry C 5 (2017) 582–588; doi:10.1039/C6TC04612F

data_7235154
_publ_section_title
;
 The effect of hexyl side chains on molecular conformations, crystal
 packing, and charge transport of oligothiophenes
;
_journal_name_full               'Journal of Materials Chemistry C'
_journal_page_first              582
_journal_page_last               588
_journal_paper_doi               10.1039/C6TC04612F
_journal_volume                  5
_journal_year                    2017
_chemical_formula_moiety         'C6 H2 S2, 2(C4 H3 S)'
_chemical_formula_sum            'C14 H8 S4'
_chemical_formula_weight         304.44
_space_group_crystal_system      triclinic
_space_group_IT_number           2
_space_group_name_Hall           '-P 1'
_space_group_name_H-M_alt        'P -1'
_atom_sites_solution_hydrogens   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_cell_angle_alpha                87.647(5)
_cell_angle_beta                 77.952(4)
_cell_angle_gamma                82.023(4)
_cell_formula_units_Z            2
_cell_length_a                   5.7171(3)
_cell_length_b                   8.6010(6)
_cell_length_c                   13.2287(8)
_cell_measurement_reflns_used    3651
_cell_measurement_temperature    90.0(2)
_cell_measurement_theta_max      66.93
_cell_measurement_theta_min      3.42
_cell_volume                     629.96(7)
_computing_cell_refinement       '<i>APEX2</i> (Bruker-AXS, 2006)'
_computing_data_collection       '<i>APEX2</i> (Bruker-AXS, 2006)'
_computing_data_reduction        '<i>APEX2</i> (Bruker-AXS, 2006)'
_computing_molecular_graphics    '<i>XP in SHELXTL</i> (Sheldrick, 2008)'
_computing_publication_material
'<i>SHELX</i> (Sheldrick, 2008) and <i>CIFFIX</i> (Parkin, 2013)'
_computing_structure_refinement  '<i>SHELXL-2014/7</i> (Sheldrick, 2015b)'
_computing_structure_solution    '<i>SHELXT</i> (Sheldrick, 2015a)'
_diffrn_ambient_temperature      90.0(2)
_diffrn_detector_area_resol_mean 5.6
_diffrn_measured_fraction_theta_full 0.981
_diffrn_measured_fraction_theta_max 0.977
_diffrn_measurement_device_type  'Bruker X8 Proteum diffractometer'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0479
_diffrn_reflns_av_unetI/netI     0.0418
_diffrn_reflns_Laue_measured_fraction_full 0.981
_diffrn_reflns_Laue_measured_fraction_max 0.977
_diffrn_reflns_limit_h_max       2
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            7897
_diffrn_reflns_point_group_measured_fraction_full 0.981
_diffrn_reflns_point_group_measured_fraction_max 0.977
_diffrn_reflns_theta_full        67.679
_diffrn_reflns_theta_max         68.275
_diffrn_reflns_theta_min         3.416
_diffrn_source                   'fine-focus rotating anode'
_exptl_absorpt_coefficient_mu    6.713
_exptl_absorpt_correction_T_max  0.956
_exptl_absorpt_correction_T_min  0.666
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '<i>SADABS</i> (Krause et al., 2015)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.605
_exptl_crystal_description       flake
_exptl_crystal_F_000             312
_exptl_crystal_size_max          0.270
_exptl_crystal_size_mid          0.130
_exptl_crystal_size_min          0.002
_refine_diff_density_max         0.372
_refine_diff_density_min         -0.298
_refine_diff_density_rms         0.078
_refine_ls_extinction_coef       .
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.160
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     203
_refine_ls_number_reflns         2255
_refine_ls_number_restraints     470
_refine_ls_restrained_S_all      1.058
_refine_ls_R_factor_all          0.0549
_refine_ls_R_factor_gt           0.0475
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0575P)^2^+0.9557P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1381
_refine_ls_wR_factor_ref         0.1441
_reflns_Friedel_coverage         0.000
_reflns_Friedel_fraction_full    .
_reflns_Friedel_fraction_max     .
_reflns_number_gt                1958
_reflns_number_total             2255
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            J-Mater-Chem-C-2017-5-582.cif
_cod_data_source_block           x14080
_cod_database_code               7235154
_shelx_estimated_absorpt_t_min   0.264
_shelx_estimated_absorpt_t_max   0.987
_exptl_absorpt_special_details
; 
In addition to absorption, multi-scan techniques also correct other slowly 
varying changes in scale factor over reciprocal space, such as those caused 
by x-ray beam inhomogeneity, goniometer imperfection, crystal decomposition, 
crystal longer than the x-ray beam cross section, absorption by the crystal 
mount etc.  These account, by and large, for much of the difference between 
estimated values of Tmin and Tmax and the _exptl_absorpt_correction_ values. 
;
_shelx_res_checksum              33317
_shelx_hkl_checksum              57556