A Soluble Pentacene: Synthesis, EPR and Electrochemical Studies of 2,3,9,10-Tetrakis(trimethylsilyl)pentacene
Henry N.C. Wong; Siu Hin Chan; Xiao-Ming Chen; Nan Yan Fu; Hung Kay Lee; Yu Man Wang; Chemical Communications  (2005) –; doi:10.1039/b411831f

data_7101106
_publ_section_title
;
A Soluble Pentacene: Synthesis, EPR and
Electrochemical Studies of 2,3,9,10-Tetrakis(trimethylsilyl)pentacene
;
_journal_issue                   1
_journal_name_full               'Chemical Communications'
_journal_paper_doi               10.1039/b411831f
_journal_year                    2005
_chemical_formula_sum            'C40 H60 Si4'
_chemical_formula_weight         653.24
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 95.71(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   16.574(4)
_cell_length_b                   13.868(3)
_cell_length_c                   18.762(4)
_cell_measurement_temperature    123(2)
_cell_volume                     4291.2(16)
_computing_cell_refinement
'SAINT-PLUS for Windows NT, Ver. 6.0, Bruker AXS Inc., 1997.'
_computing_data_collection
'SMART for Windows NT, Bruker AXS Inc.,  1998.'
_computing_data_reduction
'SAINT-PLUS for Windows NT, Ver. 6.0, Bruker AXS Inc., 1997.'
_computing_molecular_graphics
'XP-Interactive Molecular Graphics, Ver. 6.10, Bruker AXS Inc., 2000.'
_computing_publication_material  'SHELXTL-Bruker AXS Inc., 1998.'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker Apex CCD'
_diffrn_measurement_method       '\w scan'
_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  0.0326
_diffrn_reflns_av_sigmaI/netI    0.0285
_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -21
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            46139
_diffrn_reflns_theta_full        28.00
_diffrn_reflns_theta_max         28.00
_diffrn_reflns_theta_min         2.81
_exptl_absorpt_coefficient_mu    0.162
_exptl_absorpt_correction_T_max  0.9530
_exptl_absorpt_correction_T_min  0.9380
_exptl_absorpt_correction_type   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.011
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1424
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.779
_refine_diff_density_min         -0.551
_refine_diff_density_rms         0.092
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         10359
_refine_ls_number_restraints     88
_refine_ls_restrained_S_all      1.070
_refine_ls_R_factor_all          0.0818
_refine_ls_R_factor_gt           0.0670
_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^)+(0.1250P)^2^+2.5699P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1915
_refine_ls_wR_factor_ref         0.2088
_reflns_number_gt                8207
_reflns_number_total             10359
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b411831f.txt
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7101106