Synthesis, Molecular Packing, and Thin Film Transistors of Dibenzo[a,m]rubicenes.
Gu, Xiao; Xu, Xiaomin; Li, Huiyan; Liu, Zhifeng; Miao, Qian; Journal of the American Chemical Society 137 (2015) 16203–16208; doi:10.1021/jacs.5b10687

data_4124831
_publ_section_title
;
 Synthesis, Molecular Packing, and Thin Film Transistors of
 Dibenzo[a,m]rubicenes.
;
_journal_issue                   51
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              16203
_journal_page_last               16208
_journal_paper_doi               10.1021/jacs.5b10687
_journal_volume                  137
_journal_year                    2015
_chemical_formula_sum            'C50 H46 Si2'
_chemical_formula_weight         703.05
_chemical_name_systematic
; 
 5,14-di(t-butyldimethylsilylethynyl)dibenzo[a,m]rubicene 
;
_space_group_IT_number           56
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ab 2ac'
_symmetry_space_group_name_H-M   'P c c n'
_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                90.00
_cell_formula_units_Z            4
_cell_length_a                   21.236(4)
_cell_length_b                   24.857(5)
_cell_length_c                   7.6161(14)
_cell_measurement_reflns_used    26
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      15
_cell_measurement_theta_min      15
_cell_volume                     4020.3(13)
_computing_cell_refinement       'BRUKER KAPPA APEXII DUO DIFFRACTOMETER'
_computing_data_collection       'BRUKER KAPPA APEXII DUO DIFFRACTOMETER'
_computing_data_reduction        'BRUKER KAPPA APEXII DUO DIFFRACTOMETER'
_computing_molecular_graphics    'SIEMENS SHELXTL'
_computing_publication_material  'SIEMENS SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'BRUKER KAPPA APEXII DUO DIFFRACTOMETER'
_diffrn_measurement_method       'PHI & OMEGA 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  0.1456
_diffrn_reflns_av_sigmaI/netI    0.0844
_diffrn_reflns_limit_h_max       25
_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            34073
_diffrn_reflns_theta_full        25.25
_diffrn_reflns_theta_max         25.25
_diffrn_reflns_theta_min         1.92
_exptl_absorpt_coefficient_mu    0.122
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.6716
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.162
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1496
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.179
_refine_diff_density_min         -0.251
_refine_diff_density_rms         0.042
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.027
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     235
_refine_ls_number_reflns         3638
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.1710
_refine_ls_R_factor_gt           0.0572
_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^)+(0.0639P)^2^+1.1807P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1168
_refine_ls_wR_factor_ref         0.1704
_reflns_number_gt                1610
_reflns_number_total             3638
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja5b10687_si_004.cif
_cod_data_source_block           tBDMS-dibenzorubicene
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/usr/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_original_cell_volume        4020.3(14)
_cod_original_sg_symbol_H-M      Pccn
_cod_database_code               4124831