After 118 years, the isolation of two common radical anion reductants as simple, stable solids.
Scott, Thomas A; Ooro, Betty A; Collins, David J; Shatruk, Michael; Yakovenko, Andrey; Dunbar, Kim R; Zhou, Hong-Cai; Chemical communications (Cambridge, England) 34 (2008) 65–67; doi:10.1039/b815272a

data_7104108
_publ_section_title
;
 After 118 years, the isolation of two common radical anion reductants
 as simple, stable solids.
;
_journal_issue                   1
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              65
_journal_page_last               67
_journal_paper_doi               10.1039/b815272a
_journal_volume                  34
_journal_year                    2008
_chemical_formula_moiety         '(K 1+)2, (C10H8 1-)2, (C4H8O)'
_chemical_formula_sum            'C24 H24 K2 O'
_chemical_formula_weight         406.63
_chemical_name_common            'potassium naphthalenide tetrahydrofuran'
_chemical_name_systematic
;
?
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 97.655(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
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_cell_length_b                   10.2540(15)
_cell_length_c                   11.5701(16)
_cell_measurement_reflns_used    1114
_cell_measurement_temperature    213(2)
_cell_measurement_theta_max      21.60
_cell_measurement_theta_min      2.30
_cell_volume                     2100.6(6)
_computing_cell_refinement       'SAINTPlus (Bruker, 1998a)'
_computing_data_collection       'SMART (Bruker, 1998b)'
_computing_data_reduction        'SAINTPlus (Bruker, 1998a)'
_computing_molecular_graphics    'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_computing_publication_material  'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_computing_structure_refinement  'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_computing_structure_solution    'SHELXTL ver. 5.1 (Sheldrick, 1998b)'
_diffrn_ambient_temperature      213(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker SMART 1000 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  0.0273
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_diffrn_reflns_limit_h_max       21
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            5599
_diffrn_reflns_theta_full        25.06
_diffrn_reflns_theta_max         25.06
_diffrn_reflns_theta_min         2.30
_exptl_absorpt_coefficient_mu    0.461
_exptl_absorpt_correction_T_max  0.9134
_exptl_absorpt_correction_T_min  0.8021
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1998a)'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.286
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       plate
_exptl_crystal_F_000             856
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.162
_refine_diff_density_min         -0.156
_refine_diff_density_rms         0.035
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     123
_refine_ls_number_reflns         1861
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.0685
_refine_ls_R_factor_gt           0.0417
_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^)+(0.0300P)^2^+1.4000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0820
_refine_ls_wR_factor_ref         0.0910
_reflns_number_gt                1309
_reflns_number_total             1861
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            b815272a.txt
_cod_data_source_block           andr
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to '/home/saulius/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1527 2010-12-29 10:47:43Z saulius 
;
_cod_original_sg_symbol_H-M      'C 2/c'
_cod_database_code               7104108