Experimental observation of C60 LUMO splitting in the C60(2-) dianions due to the Jahn-Teller effect. Comparison with the C60(˙-) radical anions.
Konarev, Dmitri V.; Kuzmin, Alexey V.; Simonov, Sergey V.; Yudanova, Evgeniya I.; Khasanov, Salavat S.; Saito, Gunzi; Lyubovskaya, Rimma N.; Physical chemistry chemical physics : PCCP 15 (2013) 9136–9144; doi:10.1039/c3cp44359k

data_7211283
_publ_section_title
;
 Experimental observation of C60 LUMO splitting in the C60(2-) dianions
 due to the Jahn-Teller effect. Comparison with the C60(&#x02D9;-) radical
 anions.
;
_journal_issue                   23
_journal_name_full               'Physical chemistry chemical physics : PCCP'
_journal_page_first              9136
_journal_page_last               9144
_journal_paper_doi               10.1039/c3cp44359k
_journal_volume                  15
_journal_year                    2013
_chemical_formula_moiety         ' C60, 2(C36 H30 N P2), 2(C6 H4 Cl2)'
_chemical_formula_sum            'C144 H68 Cl4 N2 P4'
_chemical_formula_weight         2091.68
_chemical_name_systematic
;
?
;
_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                 99.424(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   11.9324(4)
_cell_length_b                   23.1418(8)
_cell_length_c                   17.7613(6)
_cell_measurement_reflns_used    27536
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      32.4696
_cell_measurement_theta_min      1.7265
_cell_volume                     4838.4(3)
_computing_cell_refinement
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_collection
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_data_reduction
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
;
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'Superflip (Palatinus & Chapuis, 2007)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 10.4752
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.942
_diffrn_measurement_device_type  'Xcalibur, Ruby, Gemini'
_diffrn_measurement_method       \w-scans
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0363
_diffrn_reflns_av_sigmaI/netI    0.0284
_diffrn_reflns_limit_h_max       17
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       34
_diffrn_reflns_limit_k_min       -34
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            74532
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         32.54
_diffrn_reflns_theta_min         1.73
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.252
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.90450
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro, Agilent Technologies,
Version 1.171.35.11 (release 16-05-2011 CrysAlis171 .NET)
(compiled May 16 2011,17:55:39)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.436
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             2148
_exptl_crystal_size_max          0.54
_exptl_crystal_size_mid          0.48
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.499
_refine_diff_density_min         -0.613
_refine_diff_density_rms         0.060
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.049
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     878
_refine_ls_number_reflns         16545
_refine_ls_number_restraints     322
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0602
_refine_ls_R_factor_gt           0.0489
_refine_ls_shift/su_max          0.008
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0519P)^2^+2.6890P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1135
_refine_ls_wR_factor_ref         0.1192
_reflns_number_gt                14193
_reflns_number_total             16545
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            c3cp44359k.txt
_cod_data_source_block           PPN2_C60_DCB2_100K
_cod_original_sg_symbol_Hall     -P2ybc
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7211283