Reactions of C70(2-) with Organic Halides Revisited: Unusual Magnetic Equivalence for the Diastereotopic Methylene Protons in 2,5-(PhCH2)2C70
Shu-Hui Li; Zong-Jun Li; Wei-Wei Yang; Xiang Gao; Journal of Organic Chemistry 78 (2013) 7208–7215; doi:10.1021/jo4011848

data_4028444
_publ_section_title
;
 Reactions of C70(2-) with Organic Halides Revisited: Unusual Magnetic
 Equivalence for the Diastereotopic Methylene Protons in 2,5-(PhCH2)2C70
;
_journal_name_full               'Journal of Organic Chemistry'
_journal_page_first              7208
_journal_page_last               7215
_journal_paper_doi               10.1021/jo4011848
_journal_volume                  78
_journal_year                    2013
_chemical_formula_sum            'C86 H12 Br2 S4'
_chemical_formula_weight         1333.02
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           60
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2n 2ab'
_symmetry_space_group_name_H-M   'P b c n'
_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            8
_cell_length_a                   50.558(3)
_cell_length_b                   10.0753(6)
_cell_length_c                   20.1387(12)
_cell_measurement_reflns_used    9923
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.27
_cell_measurement_theta_min      2.18
_cell_volume                     10258.4(11)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEXII CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_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  0.0831
_diffrn_reflns_av_sigmaI/netI    0.0616
_diffrn_reflns_limit_h_max       60
_diffrn_reflns_limit_h_min       -60
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            49745
_diffrn_reflns_theta_full        25.03
_diffrn_reflns_theta_max         25.03
_diffrn_reflns_theta_min         0.81
_exptl_absorpt_coefficient_mu    1.803
_exptl_absorpt_correction_T_max  0.7864
_exptl_absorpt_correction_T_min  0.5473
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_density_diffrn    1.726
_exptl_crystal_F_000             5296
_exptl_crystal_size_max          0.38
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.14
_refine_diff_density_max         1.804
_refine_diff_density_min         -0.891
_refine_diff_density_rms         0.096
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.053
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     829
_refine_ls_number_reflns         9025
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.053
_refine_ls_R_factor_all          0.1158
_refine_ls_R_factor_gt           0.0717
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0883P)^2^+37.4617P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1791
_refine_ls_wR_factor_ref         0.2041
_reflns_number_gt                5935
_reflns_number_total             9025
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jo4011848_si_003.cif
_cod_data_source_block           4br
_cod_original_cell_volume        10258.4(10)
_cod_database_code               4028444