Can the hexamethylhydrazinium dication [Me3N‒NMe3]2+ be prepared?
Zhang, Yun; Reed, Christopher A.; Dalton Transactions  (2008) 4392–4394; doi:10.1039/b803304h

data_7004161
_publ_section_title
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 Can the hexamethylhydrazinium dication [Me3N--NMe3]2+ be prepared?
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_journal_issue                   33
_journal_name_full               'Dalton Transactions'
_journal_page_first              4392
_journal_page_last               4394
_journal_paper_doi               10.1039/b803304h
_journal_year                    2008
_chemical_formula_sum            'C12 H20 B22 Cl24 N2'
_chemical_formula_weight         1280.92
_chemical_name_systematic
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?
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_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
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_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                86.776(2)
_cell_angle_beta                 76.961(2)
_cell_angle_gamma                83.128(2)
_cell_formula_units_Z            2
_cell_length_a                   9.0345(8)
_cell_length_b                   15.8644(15)
_cell_length_c                   17.1466(16)
_cell_measurement_reflns_used    9884
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      31.31
_cell_measurement_theta_min      2.33
_cell_volume                     2375.9(4)
_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      100(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0554
_diffrn_reflns_av_sigmaI/netI    0.0656
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       22
_diffrn_reflns_limit_k_min       -22
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            41076
_diffrn_reflns_theta_full        30.51
_diffrn_reflns_theta_max         30.51
_diffrn_reflns_theta_min         1.75
_exptl_absorpt_coefficient_mu    1.398
_exptl_absorpt_correction_T_max  0.9436
_exptl_absorpt_correction_T_min  0.6906
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.790
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    .
_exptl_crystal_description       'needle frag'
_exptl_crystal_F_000             1248
_exptl_crystal_size_max          0.29
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.727
_refine_diff_density_min         -0.561
_refine_diff_density_rms         0.118
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.004
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     559
_refine_ls_number_reflns         14342
_refine_ls_number_restraints     22
_refine_ls_restrained_S_all      1.003
_refine_ls_R_factor_all          0.0717
_refine_ls_R_factor_gt           0.0409
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0452P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0875
_refine_ls_wR_factor_ref         0.1003
_reflns_number_gt                10073
_reflns_number_total             14342
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b803304h.txt
_cod_data_source_block           cr201_0m
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Triclinic' changed to 'triclinic'
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 
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_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7004161