Synthesis of a Basket-Shaped C56H38 Hydrocarbon as a Precursor toward an End-Cap Template for Carbon [6,6]Nanotubes
Hu Cui; Novruz G. Akhmedov; Jeffrey L. Petersen; Kung K. Wang; Journal of Organic Chemistry 75 (2010) 2050–2056; doi:10.1021/jo100132v

data_4025294
_publ_section_title
;
 Synthesis of a Basket-Shaped C56H38 Hydrocarbon as a Precursor toward an
 End-Cap Template for Carbon [6,6]Nanotubes
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              2050
_journal_page_last               2056
_journal_paper_doi               10.1021/jo100132v
_journal_volume                  75
_journal_year                    2010
_chemical_formula_sum            'C26 H16 Br2 O2'
_chemical_formula_weight         520.21
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 91.3720(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.3579(9)
_cell_length_b                   13.0133(11)
_cell_length_c                   13.2737(11)
_cell_measurement_reflns_used    5012
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.75
_cell_measurement_theta_min      2.22
_cell_volume                     2134.0(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_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  0.0537
_diffrn_reflns_av_sigmaI/netI    0.0720
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            14761
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         2.19
_diffrn_standards_decay_%        none
_exptl_absorpt_coefficient_mu    3.819
_exptl_absorpt_correction_type   semi-empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.619
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1032
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.753
_refine_diff_density_min         -0.815
_refine_diff_density_rms         0.084
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    riding
_refine_ls_matrix_type           full
_refine_ls_number_parameters     273
_refine_ls_number_reflns         4842
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.022
_refine_ls_R_factor_all          0.0872
_refine_ls_R_factor_gt           0.0540
_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^)+(0.0668P)^2^+1.4911P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1383
_refine_ls_wR_factor_ref         0.1586
_reflns_number_gt                3154
_reflns_number_total             4842
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo100132v_si_005.cif
_cod_data_source_block           hc8ccd
_cod_database_code               4025294