C–H activation route to dibenzo[a,e]pentalenes: annulation of arylacetylenes promoted by PdCl2–AgOTf–o-chloranil
Maekawa, Takehisa; Segawa, Yasutomo; Itami, Kenichiro; Chemical Science 4 (2013) 2369–; doi:10.1039/c3sc50585e

data_1514666
_publ_section_title
;
 C--H activation route to dibenzo[a,e]pentalenes: annulation of
 arylacetylenes promoted by PdCl2--AgOTf--o-chloranil
;
_journal_issue                   6
_journal_name_full               'Chemical Science'
_journal_page_first              2369
_journal_paper_doi               10.1039/c3sc50585e
_journal_volume                  4
_journal_year                    2013
_chemical_formula_sum            'C28 H18'
_chemical_formula_weight         354.42
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 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                 122.671(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   23.095(10)
_cell_length_b                   4.8656(17)
_cell_length_c                   18.761(8)
_cell_measurement_reflns_used    1579
_cell_measurement_temperature    103(2)
_cell_measurement_theta_max      25.3295
_cell_measurement_theta_min      3.5428
_cell_volume                     1774.6(12)
_computing_cell_refinement       'RIGAKU CrystalClear'
_computing_data_collection       'RIGAKU CrystalClear'
_computing_data_reduction        'RIGAKU CrystalClear'
_computing_molecular_graphics    ORTEP-III
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SIR-97
_diffrn_ambient_temperature      103(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type
;
Saturn70 CCD (4x4 bin mode) with MicroMax-007
;
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71070
_diffrn_reflns_av_R_equivalents  0.0356
_diffrn_reflns_av_sigmaI/netI    0.0385
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            5444
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.54
_exptl_absorpt_coefficient_mu    0.075
_exptl_absorpt_correction_T_max  0.9963
_exptl_absorpt_correction_T_min  0.9851
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            Red
_exptl_crystal_density_diffrn    1.327
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Block
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.723
_refine_diff_density_min         -0.251
_refine_diff_density_rms         0.054
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.124
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     164
_refine_ls_number_reflns         1550
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.124
_refine_ls_R_factor_all          0.0790
_refine_ls_R_factor_gt           0.0645
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0806P)^2^+2.5251P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1576
_refine_ls_wR_factor_ref         0.1690
_reflns_number_gt                1239
_reflns_number_total             1550
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3sc50585e.txt
_cod_data_source_block           2a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/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 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_cell_volume        1774.7(13)
_cod_original_sg_symbol_H-M      C2/c
_cod_database_code               1514666