Multiethynyl Corannulenes: Synthesis, Structure, and Properties
Yao-Ting Wu; Davide Bandera; Roman Maag; Anthony Linden; Kim K. Baldridge; Jay S. Siegel; Journal of the American Chemical Society 130 (2008) 10729–10739; doi:10.1021/ja802334n

data_4108176
_publ_section_title
;
 Multiethynyl Corannulenes: Synthesis, Structure, and Properties
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              10729
_journal_page_last               10739
_journal_paper_doi               10.1021/ja802334n
_journal_volume                  130
_journal_year                    2008
_chemical_absolute_configuration ad
_chemical_formula_moiety         'C20 H6 Br4'
_chemical_formula_sum            'C20 H6 Br4'
_chemical_formula_weight         565.88
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      33
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             04-08-17
_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                   17.8356(5)
_cell_length_b                   22.9372(7)
_cell_length_c                   3.8032(1)
_cell_measurement_reflns_used    14969
_cell_measurement_temperature    160(1)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      2.0
_cell_volume                     1555.88(8)
_computing_cell_refinement       'DENZO-SMN (Otwinowski & Minor, 1997)'
_computing_data_collection       'COLLECT (Nonius, 2000)'
_computing_data_reduction
'DENZO-SMN and SCALEPACK (Otwinowski & Minor, 1997)'
_computing_molecular_graphics    'ORTEPII (Johnson, 1976)'
_computing_publication_material  'SHELXL97 and PLATON (Spek, 2003)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      160(1)
_diffrn_detector                 '65 mm CCD camera on \k goniostat'
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type
'Nonius KappaCCD area-detector diffractometer'
_diffrn_measurement_method       '\f and \w scans with \k offsets'
_diffrn_radiation_monochromator  'horizontally mounted graphite crystal'
_diffrn_radiation_source         'Nonius FR590 sealed tube generator'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0763
_diffrn_reflns_av_sigmaI/netI    0.0497
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -29
_diffrn_reflns_limit_l_max       4
_diffrn_reflns_limit_l_min       -4
_diffrn_reflns_number            24902
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         2.28
_diffrn_standards_decay_%        0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    10.375
_exptl_absorpt_correction_T_max  0.600
_exptl_absorpt_correction_T_min  0.475
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   '(Blessing, 1995)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.416
_exptl_crystal_description       needle
_exptl_crystal_F_000             1064
_exptl_crystal_size_max          0.23
_exptl_crystal_size_mid          0.07
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.570
_refine_diff_density_min         -0.525
_refine_diff_density_rms         0.119
_refine_ls_abs_structure_details 'Flack (1983)'
_refine_ls_abs_structure_Flack   0.005(16)
_refine_ls_extinction_coef       0.0013(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.036
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     218
_refine_ls_number_reflns         3528
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.036
_refine_ls_R_factor_all          0.0523
_refine_ls_R_factor_gt           0.0354
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0364P)^2^+0.5011P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0693
_refine_ls_wR_factor_ref         0.0749
_reflns_number_gt                2905
_reflns_number_total             3530
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ja802334n-file004.cif
_cod_data_source_block           SG0424
_cod_original_sg_symbol_H-M      'P n a 21 '
_cod_database_code               4108176