Preparation of 6,13-Bis(trimethylsilyl)pentacene and Formation of Second-Ring Diels-Alder Adduct of Pentacene
Zhiying Jia; Shi Li; Kiyohiko Nakajima; Ken-ichiro Kanno; Tamotsu Takahashi; Journal of Organic Chemistry 76 (2011) 293–296; doi:10.1021/jo101774d

data_4025951
_publ_section_title
;
 Preparation of 6,13-Bis(trimethylsilyl)pentacene and Formation of
 Second-Ring Diels-Alder Adduct of Pentacene
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              293
_journal_page_last               296
_journal_paper_doi               10.1021/jo101774d
_journal_volume                  76
_journal_year                    2011
_chemical_formula_moiety         'C32 H32 O3 Si2 '
_chemical_formula_sum            'C32 H32 O3 Si2'
_chemical_formula_weight         520.77
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      62
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_cell_angle_alpha                90.0000
_cell_angle_beta                 90.0000
_cell_angle_gamma                90.0000
_cell_formula_units_Z            4
_cell_length_a                   12.2401(4)
_cell_length_b                   18.7937(7)
_cell_length_c                   11.7298(4)
_cell_measurement_reflns_used    21957
_cell_measurement_temperature    298.1
_cell_measurement_theta_max      27.7
_cell_measurement_theta_min      3.2
_cell_volume                     2698.29(16)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       PROCESS-AUTO
_computing_data_reduction        CrystalStructure
_computing_publication_material  'CrystalStructure 3.8'
_computing_structure_refinement  SHELXL
_computing_structure_solution    SIR2004
_diffrn_ambient_temperature      298
_diffrn_detector_area_resol_mean 6.85
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku SCXmini'
_diffrn_measurement_method       \w
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.089
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -24
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -15
_diffrn_reflns_number            26394
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_exptl_absorpt_coefficient_mu    0.164
_exptl_absorpt_correction_T_max  0.984
_exptl_absorpt_correction_T_min  0.955
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;
    Higashi, T. (1999). Program for Absorption Correction.
    Rigaku Corporation, Tokyo, Japan.
;
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    1.282
_exptl_crystal_description       Prism
_exptl_crystal_F_000             1104.00
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.25
_refine_diff_density_min         -0.29
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.116
_refine_ls_hydrogen_treatment    refall
_refine_ls_number_parameters     234
_refine_ls_number_reflns         3176
_refine_ls_R_factor_gt           0.0632
_refine_ls_shift/su_max          0.0020
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w = 1/[\s^2^(Fo^2^)+(0.0515P)^2^+1.0773P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.1413
_reflns_number_gt                2307
_reflns_number_total             3176
_reflns_threshold_expression     F^2^>2.0\s(F^2^)
_cod_data_source_file            jo101774d_si_004.cif
_cod_data_source_block           '_tt168x_in_Pnma'
_cod_original_formula_sum        'C32 H32 O3 Si2 '
_cod_database_code               4025951