Syntheses and Structures of 6,13-Dihydro-6,13-diborapentacenes: π-Stacking in Heterocyclic Analogues of Pentacene
Chen, Jinhui; Kampf, Jeff W.; Ashe, Arthur J.; Organometallics 27 (2008) 3639–; doi:10.1021/om8005068

data_4071995
_publ_section_title
;
 Syntheses and Structures of 6,13-Dihydro-6,13-diborapentacenes:
 \p-Stacking in Heterocyclic Analogues of Pentacene
;
_journal_issue                   15
_journal_name_full               Organometallics
_journal_page_first              3639
_journal_paper_doi               10.1021/om8005068
_journal_volume                  27
_journal_year                    2008
_chemical_formula_moiety         'C38 H34 B2'
_chemical_formula_sum            'C38 H34 B2'
_chemical_formula_weight         512.27
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           148
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-R 3'
_symmetry_space_group_name_H-M   'R -3 :H'
_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                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            9
_cell_length_a                   30.2192(12)
_cell_length_b                   30.2192(12)
_cell_length_c                   8.4832(7)
_cell_measurement_reflns_used    9886
_cell_measurement_temperature    85(2)
_cell_measurement_theta_max      23.24
_cell_measurement_theta_min      2.33
_cell_volume                     6709.0(7)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker SMART-APEX'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      85(2)
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0572
_diffrn_reflns_av_sigmaI/netI    0.0198
_diffrn_reflns_limit_h_max       40
_diffrn_reflns_limit_h_min       -40
_diffrn_reflns_limit_k_max       40
_diffrn_reflns_limit_k_min       -40
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            62808
_diffrn_reflns_theta_full        28.37
_diffrn_reflns_theta_max         28.37
_diffrn_reflns_theta_min         2.33
_exptl_absorpt_coefficient_mu    0.063
_exptl_absorpt_correction_T_max  0.9906
_exptl_absorpt_correction_T_min  0.9800
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
  Blessing, R. Acta Cryst. (1995) A51 33-38.
  Sheldrick, G.  SADABS (Version 2007/4) Bruker AXS area
  detector absorption and other corrections, University of
  Gottingen, Germany 2007.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.141
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2448
_exptl_crystal_size_max          0.32
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.432
_refine_diff_density_min         -0.296
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.043
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     207
_refine_ls_number_reflns         3738
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.043
_refine_ls_R_factor_all          0.0554
_refine_ls_R_factor_gt           0.0494
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0818P)^2^+5.9890P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1315
_refine_ls_wR_factor_ref         0.1385
_reflns_number_gt                3275
_reflns_number_total             3738
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            om8005068-file001.cif
_cod_data_source_block           cj233
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Trigonal' changed to 'trigonal'
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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      R-3
_cod_database_code               4071995