Synthesis of methoxy-substituted picenes: substitution position effect on their electronic and single-crystal structures.
Mori, Hiroki; Chen, Xi-Chao; Chang, Ning-Hui; Hamao, Shino; Kubozono, Yoshihiro; Nakajima, Kiyohiko; Nishihara, Yasushi; The Journal of organic chemistry 79 (2014) 4973–4983; doi:10.1021/jo500543h

data_4029445
_publ_section_title
;
 Synthesis of methoxy-substituted picenes: substitution position effect on
 their electronic and single-crystal structures.
;
_journal_issue                   11
_journal_name_full               'The Journal of organic chemistry'
_journal_page_first              4973
_journal_page_last               4983
_journal_paper_doi               10.1021/jo500543h
_journal_volume                  79
_journal_year                    2014
_chemical_formula_moiety         'C24 H18 O2'
_chemical_formula_sum            'C24 H18 O2'
_chemical_formula_weight         338.38
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      19
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_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                   6.993(3)
_cell_length_b                   8.884(4)
_cell_length_c                   26.801(7)
_cell_measurement_reflns_used    12808
_cell_measurement_temperature    298
_cell_measurement_theta_max      27.47
_cell_measurement_theta_min      3.01
_cell_volume                     1665.0(11)
_computing_cell_refinement       'RAPID AUTO'
_computing_data_collection       'RAPID AUTO'
_computing_data_reduction        'RAPID AUTO'
_computing_molecular_graphics    'CrystalStructure 4.0 (Rigaku, 2010)'
_computing_publication_material  'CrystalStructure 4.0'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298
_diffrn_detector_area_resol_mean 10.000
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Rigaku R-AXIS RAPID'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0250
_diffrn_reflns_av_sigmaI/netI    0.0196
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            16503
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         3.01
_exptl_absorpt_coefficient_mu    0.085
_exptl_absorpt_correction_T_max  0.9874
_exptl_absorpt_correction_T_min  0.9510
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'NUMABS (Rigaku, 1999)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.350
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             712
_exptl_crystal_size_max          0.60
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.126
_refine_diff_density_min         -0.127
_refine_diff_density_rms         0.027
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.2(12)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.059
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     307
_refine_ls_number_reflns         3809
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.059
_refine_ls_R_factor_all          0.0435
_refine_ls_R_factor_gt           0.0338
_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^)+(0.0494P)^2^+0.0704P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0849
_refine_ls_wR_factor_ref         0.0897
_reflns_number_gt                3176
_reflns_number_total             3809
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo500543h_si_004.cif
_cod_data_source_block           yn37
_cod_depositor_comments
'Adding full bibliography for 4029445--4029447.cif.'
_cod_original_cell_volume        1665.0(10)
_cod_database_code               4029445