The First Crystalline Alkali Metal Salt of a Benzenoid Radical Anion without a Stabilizing Substituent and of a Related Dimer: X-ray Structures of the Toluene Radical Anion and of the Benzene Radical Anion Dimer Potassium-Crown Ether Salts
Peter B. Hitchcock; Michael F. Lappert; Andrey V. Protchenko; Journal of the American Chemical Society 123 (2001) 189–190; doi:10.1021/ja005580e

data_4115413
_publ_section_title
;
 The First Crystalline Alkali Metal Salt of a Benzenoid Radical Anion
 without a Stabilizing Substituent and of a Related Dimer: X-ray
 Structures of the Toluene Radical Anion and of the Benzene Radical Anion
 Dimer Potassium-Crown Ether Salts
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              189
_journal_page_last               190
_journal_paper_doi               10.1021/ja005580e
_journal_volume                  123
_journal_year                    2001
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'C36 H60 K2 O12'
_chemical_formula_structural     'C36 H60 K2 O12'
_chemical_formula_sum            'C36 H60 K2 O12'
_chemical_formula_weight         763.04
_chemical_name_common            '[{K(18-crown6)}2(C12H12)]'
_chemical_name_systematic
;

?

;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      62
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location
ftp://ftp.iucr.org/cifdics/cif_core_2.1beta5.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.1beta5
_audit_creation_date             2000-03-14T11:58:39-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   26.1009(8)
_cell_length_b                   16.3832(7)
_cell_length_c                   9.1300(3)
_cell_measurement_reflns_used    23531
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      22.986
_cell_measurement_theta_min      4.529
_cell_measurement_wavelength     0.71073
_cell_volume                     3904.1(2)
_computing_cell_refinement       'HKL Scalepack (Otwinowski & Minor 1997)'
_computing_data_reduction
'HKL Denzo and Scalepack (Otwinowski & Minor 1997)'
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device       KappaCCD
_diffrn_measurement_method       CCD
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0736
_diffrn_reflns_av_sigmaI/netI    0.0397
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -28
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            18496
_diffrn_reflns_theta_full        22.97
_diffrn_reflns_theta_max         22.97
_diffrn_reflns_theta_min         4.98
_exptl_absorpt_coefficient_mu    0.301
_exptl_crystal_colour            purple
_exptl_crystal_density_diffrn    1.298
_exptl_crystal_description       plate
_exptl_crystal_F_000             1640
_exptl_crystal_size_max          0.2
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.05
_refine_diff_density_max         0.816
_refine_diff_density_min         -0.59
_refine_diff_density_rms         0.057
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.062
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     344
_refine_ls_number_reflns         2768
_refine_ls_number_restraints     60
_refine_ls_restrained_S_all      1.071
_refine_ls_R_factor_all          0.0814
_refine_ls_R_factor_gt           0.064
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0713P)^2^+6.6999P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1542
_refine_ls_wR_factor_ref         0.1659
_reflns_number_gt                2233
_reflns_number_total             2768
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja005580e_2.cif
_cod_data_source_block           lappert-2
_cod_database_code               4115413