[Pb9CdCdPb9]6-: a Zintl cluster anion with an unsupported cadmium‒cadmium bond
Zhou, Binbin; Denning, Mark S.; Chapman, Thomas A. D.; McGrady, John E.; Goicoechea, Jose M.; Chemical Communications (Cambridge, United Kingdom)  (2009) 7221–7223; doi:10.1039/b917185a

data_7113093
_publ_section_title
;
 [Pb9CdCdPb9]6-: a Zintl cluster anion with an unsupported
 cadmium--cadmium bond
;
_journal_coden_ASTM              CHCOFS
_journal_issue                   46
_journal_name_full
;
 Chemical Communications (Cambridge, United Kingdom)
;
_journal_page_first              7221
_journal_page_last               7223
_journal_paper_doi               10.1039/b917185a
_journal_year                    2009
_chemical_formula_moiety
'9(C18 H36 K N2 O6), 1.5(Pb18 Cd2), 3(C2 H8 N2)'
_chemical_formula_sum            'C168 H348 Cd3 K9 N24 O54 Pb27'
_chemical_formula_weight         9851.93
_chemical_melting_point          ?
_chemical_name_systematic        '[K-(2,2,2-crypt)]6[Pb9CdCdPb9]*2en'
_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                 103.3206(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   23.44850(10)
_cell_length_b                   26.73970(10)
_cell_length_c                   43.1335(2)
_cell_measurement_reflns_used    371890
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      5.097
_cell_volume                     26317.34(19)
_computing_cell_refinement
;
KappaCCD software "DENZO" (Otwinowski & Minor, 1996)
;
_computing_data_collection
;
KappaCCD software "Collect" (Nonius, 2000)
;
_computing_data_reduction
;
KappaCCD software "DENZO" (Otwinowski & Minor, 1996)
;
_computing_molecular_graphics    'WinGX (Farrugia, 2005)'
_computing_publication_material  'XCIF (Sheldrick, 2001)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measured_fraction_theta_full 0.942
_diffrn_measured_fraction_theta_max 0.942
_diffrn_measurement_device_type  'Nonius KappaCCD'
_diffrn_measurement_method       '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  0.0515
_diffrn_reflns_av_sigmaI/netI    0.0838
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       51
_diffrn_reflns_limit_l_min       -51
_diffrn_reflns_number            78794
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         5.11
_exptl_absorpt_coefficient_mu    17.641
_exptl_absorpt_correction_T_max  0.4175
_exptl_absorpt_correction_T_min  0.2260
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'DENZO/SCALEPACK (Otwinowski & Minor, 1997)'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    2.487
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             17940
_exptl_crystal_size_max          0.12
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.06
_refine_diff_density_max         2.022
_refine_diff_density_min         -1.959
_refine_diff_density_rms         0.244
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.025
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     2566
_refine_ls_number_reflns         43674
_refine_ls_number_restraints     165
_refine_ls_restrained_S_all      1.027
_refine_ls_R_factor_all          0.0964
_refine_ls_R_factor_gt           0.0489
_refine_ls_shift/su_max          0.012
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0460P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0944
_refine_ls_wR_factor_ref         0.1036
_reflns_number_gt                28727
_reflns_number_total             43674
_reflns_threshold_expression     >2sigma(I)
_cod_duplicate_entry             7105071
_cod_data_source_file            b917185a.txt
_cod_data_source_block           p21c
_cod_depositor_comments
;
The following automatic conversions were performed:
'_atom_site_symetry_multiplicity' tag replaced with
'_atom_site_symmetry_multiplicity'.

Automatic conversion script
Id: cif_correct_tags 1440 2010-10-19 06:21:57Z saulius 

The following automatic conversions were performed:

'_chemical_melting_point' value 'not measured' was changed to '?' -
the value is undefined or not given.

'_symmetry_cell_setting' value
'Monoclinic' changed to 'monoclinic' according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 

The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        26317.29(19)
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               7113093