The influence of side chains on the structures and properties of functionalized pentacenes
Chen, Jihua; Subramanian, Sankar; Parkin, Sean R.; Siegler, Maxime; Gallup, Kaitlin; Haughn, Chelsea; Martin, David C.; Anthony, John E.; Journal of Materials Chemistry 18 (2008) 1961–; doi:10.1039/b717082c

data_7201838
_publ_section_title
;
 The influence of side chains on the structures and properties of
 functionalized pentacenes
;
_journal_issue                   17
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              1961
_journal_paper_doi               10.1039/b717082c
_journal_volume                  18
_journal_year                    2008
_chemical_formula_moiety         'C46 H58 Si2'
_chemical_formula_sum            'C46 H58 Si2'
_chemical_formula_weight         667.10
_space_group_IT_number           14
_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                 110.146(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.8840(2)
_cell_length_b                   22.3240(5)
_cell_length_c                   10.7970(3)
_cell_measurement_reflns_used    4721
_cell_measurement_temperature    90.0(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.00
_cell_volume                     2010.32(9)
_computing_cell_refinement       'SCALEPACK (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 1998)'
_computing_data_reduction        'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'XP in SHELXTL (Sheldrick, 1994)'
_computing_publication_material
;
SHELX97-2 (Sheldrick, 1997) and local procedures
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      90.0(2)
_diffrn_detector_area_resol_mean 18
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'Nonius KappaCCD diffractometer'
_diffrn_measurement_method       '\w scans at fixed \c = 55\%'
_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  0.0498
_diffrn_reflns_av_sigmaI/netI    0.0739
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       28
_diffrn_reflns_limit_k_min       -28
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            8955
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         1.82
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.118
_exptl_absorpt_correction_T_max  0.9941
_exptl_absorpt_correction_T_min  0.9544
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Scalepack (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            'deep blue'
_exptl_crystal_density_diffrn    1.102
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'irregular lath'
_exptl_crystal_F_000             724
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.05
_refine_diff_density_max         .358
_refine_diff_density_min         -.281
_refine_diff_density_rms         .056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     222
_refine_ls_number_reflns         4610
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.049
_refine_ls_R_factor_all          0.0973
_refine_ls_R_factor_gt           0.0503
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0644P)^2^+0.0679P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1143
_refine_ls_wR_factor_ref         0.1331
_reflns_number_gt                2931
_reflns_number_total             4610
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            b717082c.txt
_cod_data_source_block           k04226
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               7201838