Diaceno[a,e]pentalenes from Homoannulations of o-Alkynylaryliodides Utilizing a Unique Pd(OAc)2/n-Bu4NOAc Catalytic Combination.
Shen, Junjian; Yuan, Dafei; Qiao, Yan; Shen, Xingxing; Zhang, Zhongbo; Zhong, Yuwu; Yi, Yuanping; Zhu, Xiaozhang; Organic letters 16 (2014) 4924–4927; doi:10.1021/ol502440d

data_1517558
_publ_section_title
;
 Diaceno[a,e]pentalenes from Homoannulations of o-Alkynylaryliodides
 Utilizing a Unique Pd(OAc)2/n-Bu4NOAc Catalytic Combination.
;
_journal_issue                   18
_journal_name_full               'Organic letters'
_journal_page_first              4924
_journal_page_last               4927
_journal_paper_doi               10.1021/ol502440d
_journal_volume                  16
_journal_year                    2014
_chemical_formula_moiety         'C28 H34'
_chemical_formula_sum            'C28 H34'
_chemical_formula_weight         370.55
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 112.71(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.1663(16)
_cell_length_b                   18.219(4)
_cell_length_c                   7.7277(15)
_cell_measurement_reflns_used    3463
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.4845
_cell_measurement_theta_min      1.1177
_cell_volume                     1060.6(4)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_molecular_graphics
;
 Mercury: visualization and analysis of crystal structures, C. F. Macrae,
 P. R. Edgington, P. McCabe, E. Pidcock, G. P. Shields, R. Taylor,
 M. Towler and J. van de Streek, J. Appl. Cryst., 39, 453-457, 2006.
;
_computing_publication_material  'SHELX-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELX-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELX-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type  'MM007HF + CCD (Saturn724+)'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  Confocal
_diffrn_radiation_source         'Rotating Anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0383
_diffrn_reflns_av_sigmaI/netI    0.0321
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       21
_diffrn_reflns_limit_k_min       -21
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -7
_diffrn_reflns_number            5939
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.24
_exptl_absorpt_coefficient_mu    0.065
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7072
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2008)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.160
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             404
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.809
_refine_diff_density_min         -0.216
_refine_diff_density_rms         0.049
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.071
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     128
_refine_ls_number_reflns         1864
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0667
_refine_ls_R_factor_gt           0.0641
_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^)+(0.0575P)^2^+0.9515P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1450
_refine_ls_wR_factor_ref         0.1473
_reflns_number_gt                1782
_reflns_number_total             1864
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol502440d_si_004.cif
_cod_data_source_block           a
_cod_depositor_comments
'Adding full bibliography for 1517557--1517560.cif.'
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1517558