Group 14 triple-decker cations.
Jones, Jamie N.; Moore, Jennifer A.; Cowley, Alan H.; Macdonald, Charles L. B.; Dalton transactions (Cambridge, England : 2003)  (2005) 3846–3851; doi:10.1039/b510337a

data_7008851
_publ_section_title
;
 Group 14 triple-decker cations.
;
_journal_issue                   24
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              3846
_journal_page_last               3851
_journal_paper_doi               10.1039/b510337a
_journal_year                    2005
_chemical_formula_moiety         'C30 H45 Pb2, C24 B F20'
_chemical_formula_sum            'C54 H45 B F20 Pb2'
_chemical_formula_weight         1499.09
_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
;
manual editing of the .cif file
created by SHELXTL Ver. 6.10
;
_cell_angle_alpha                90
_cell_angle_beta                 114.911(5)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   22.545(5)
_cell_length_b                   14.773(5)
_cell_length_c                   17.087(5)
_cell_measurement_temperature    123(2)
_cell_volume                     5161(3)
_computing_cell_refinement       'Collect software, Nonius B.V. 1998'
_computing_data_collection       'Collect software, Nonius B.V. 1998'
_computing_data_reduction
;
DENZO and Scalepack (Otwinoski and Minor, 1997)
;
_computing_molecular_graphics    'XP SHELXTL/PC, Siemens Analytical'
_computing_structure_refinement  'XL SHELXTL/PC, Siemens Analytical'
_computing_structure_solution
;
SIR97 - Altomare A., Burla M.C., Camalli M., Cascarano G.L., Giacovazzo C.,
Guagliardi A., Moliterni A.G.G., Polidori G.,Spagna R.
;
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.995
_diffrn_measured_fraction_theta_max 0.995
_diffrn_measurement_device_type  'Nonius Kappa CCD'
_diffrn_measurement_method       \w-scan
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0138
_diffrn_reflns_av_sigmaI/netI    0.0240
_diffrn_reflns_limit_h_max       26
_diffrn_reflns_limit_h_min       -26
_diffrn_reflns_limit_k_max       17
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            8546
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         3.47
_exptl_absorpt_coefficient_mu    6.625
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.737
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
'DENZO and Scalepack (Otwinoski and Minor, 1997)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.929
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2872
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.11
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.414
_refine_diff_density_min         -0.878
_refine_diff_density_rms         0.071
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.073
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     357
_refine_ls_number_reflns         4518
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.073
_refine_ls_R_factor_all          0.0187
_refine_ls_R_factor_gt           0.0173
_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^)+(0.0167P)^2^+10.6413P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0437
_refine_ls_wR_factor_ref         0.0444
_reflns_number_gt                4284
_reflns_number_total             4518
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b510337a.txt
_cod_data_source_block           Compound4
_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_cell_volume        5162(3)
_cod_original_sg_symbol_Hall     -c2yc
_cod_original_sg_symbol_H-M      c2/c
_cod_database_code               7008851