Synthesis and stability of soluble hexacenes.
Purushothaman, Balaji; Parkin, Sean R.; Anthony, John E.; Organic letters 12 (2010) 2060–2063; doi:10.1021/ol100178s

data_1502880
_publ_section_title
;
 Synthesis and stability of soluble hexacenes.
;
_journal_issue                   9
_journal_name_full               'Organic letters'
_journal_page_first              2060
_journal_page_last               2063
_journal_paper_doi               10.1021/ol100178s
_journal_volume                  12
_journal_year                    2010
_chemical_formula_moiety         'C108 H136 Si4, C6 H14'
_chemical_formula_sum            'C114 H150 Si4'
_chemical_formula_weight         1632.70
_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                110.544(2)
_cell_angle_beta                 93.866(2)
_cell_angle_gamma                103.166(2)
_cell_formula_units_Z            1
_cell_length_a                   10.6166(5)
_cell_length_b                   14.4156(7)
_cell_length_c                   17.9265(8)
_cell_measurement_reflns_used    9927
_cell_measurement_temperature    90.0(2)
_cell_measurement_theta_max      57.47
_cell_measurement_theta_min      2.67
_cell_volume                     2468.7(2)
_computing_cell_refinement       'APEX2 (Bruker-AXS, 2006)'
_computing_data_collection       'APEX2 (Bruker-AXS, 2006)'
_computing_data_reduction        'APEX2 (Bruker-AXS, 2006)'
_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, 1997)'
_diffrn_ambient_temperature      90.0(2)
_diffrn_detector_area_resol_mean 18
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker X8 Proteum diffractometer'
_diffrn_measurement_method       '\f and \w scans'
_diffrn_radiation_monochromator  'graded multilayer optics'
_diffrn_radiation_source         'fine-focus rotating anode'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54178
_diffrn_reflns_av_R_equivalents  0.0538
_diffrn_reflns_av_sigmaI/netI    0.0371
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            6729
_diffrn_reflns_theta_full        57.71
_diffrn_reflns_theta_max         57.71
_diffrn_reflns_theta_min         2.67
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.900
_exptl_absorpt_correction_T_max  0.982
_exptl_absorpt_correction_T_min  0.815
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Sadabs in APEX2 (BrukerAXS, 2006)'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.098
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             890
_exptl_crystal_size_max          0.07
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.017
_refine_diff_density_min         -0.525
_refine_diff_density_rms         0.080
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.034
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     658
_refine_ls_number_reflns         6729
_refine_ls_number_restraints     396
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.1130
_refine_ls_R_factor_gt           0.0985
_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^)+(0.1339P)^2^+7.6795P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2551
_refine_ls_wR_factor_ref         0.2709
_reflns_number_gt                5684
_reflns_number_total             6729
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ol100178s_si_004.cif
_cod_data_source_block           x07091t
_cod_database_code               1502880