A Road Map to Stable, Soluble, Easily Crystallized Pentacene Derivatives
Anthony, John E.; Eaton, David L.; Parkin, Sean R.; Organic Letters 4 (2002) 15–; doi:10.1021/ol0167356

data_1507426
_publ_section_title
;
 A Road Map to Stable, Soluble, Easily Crystallized Pentacene Derivatives
;
_journal_issue                   1
_journal_name_full               'Organic Letters'
_journal_page_first              15
_journal_paper_doi               10.1021/ol0167356
_journal_volume                  4
_journal_year                    2002
_chemical_formula_sum            'C38 H42 Si2'
_chemical_formula_weight         554.90
_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                70.00(3)
_cell_angle_beta                 85.08(3)
_cell_angle_gamma                74.12(3)
_cell_formula_units_Z            2
_cell_length_a                   7.8190(16)
_cell_length_b                   13.569(3)
_cell_length_c                   16.508(3)
_cell_measurement_reflns_used    21848
_cell_measurement_temperature    173(1)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      1.00
_cell_volume                     1582.9(7)
_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 Siemens 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      173(1)
_diffrn_detector_area_resol_mean 18
_diffrn_measured_fraction_theta_full .998
_diffrn_measured_fraction_theta_max .998
_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  0.0777
_diffrn_reflns_av_sigmaI/netI    0.1240
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            14460
_diffrn_reflns_theta_full        27.50
_diffrn_reflns_theta_max         27.50
_diffrn_reflns_theta_min         2.43
_diffrn_standards_decay_%        <1
_exptl_absorpt_coefficient_mu    0.137
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            'deep blue'
_exptl_crystal_density_diffrn    1.164
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'cut needle'
_exptl_crystal_F_000             596
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.08
_refine_diff_density_max         .455
_refine_diff_density_min         -.410
_refine_diff_density_rms         .066
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.058
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     367
_refine_ls_number_reflns         7265
_refine_ls_number_restraints     570
_refine_ls_restrained_S_all      1.018
_refine_ls_R_factor_all          0.1135
_refine_ls_R_factor_gt           0.0664
_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^)+(0.0611P)^2^+0.2023P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1390
_refine_ls_wR_factor_ref         0.1548
_reflns_number_gt                4883
_reflns_number_total             7265
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol0167356_s2.cif
_cod_data_source_block           k01094
_cod_original_cell_volume        1582.9(6)
_cod_database_code               1507426