1,2-Distanna-closo-dodecaborate‒a rare example of a 1,2-distannylene ligand in transition metal chemistry.
Nickl, Claudia; Eichele, Klaus; Wesemann, Lars; Dalton transactions (Cambridge, England : 2003) 41 (2012) 243–250; doi:10.1039/c1dt11247c

data_7017598
_publ_section_title
;
 1,2-Distanna-closo-dodecaborate--a rare example of a 1,2-distannylene
 ligand in transition metal chemistry.
;
_journal_issue                   1
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              243
_journal_page_last               250
_journal_paper_doi               10.1039/c1dt11247c
_journal_volume                  41
_journal_year                    2012
_chemical_formula_sum            'C52 H144 B30 Mo2 N8 O6 Sn6'
_chemical_formula_weight         2206.07
_chemical_name_systematic
;
?
;
_space_group_IT_number           4
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'P 2yb'
_symmetry_space_group_name_H-M   'P 1 21 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2011-01-25 # Formatted by publCIF
;
_cell_angle_alpha                90.00
_cell_angle_beta                 117.951(5)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   15.5311(12)
_cell_length_b                   20.8394(15)
_cell_length_c                   15.9241(13)
_cell_measurement_reflns_used    58750
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      26.8
_cell_measurement_theta_min      3.1
_cell_volume                     4552.8(6)
_computing_cell_refinement       X-Area
_computing_data_collection       X-Area
_computing_data_reduction        X-Area
_computing_molecular_graphics    'Diamond Version 3.1e'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    SHELXS-97
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.987
_diffrn_measurement_device_type  'Stoe IPDS 2T'
_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  0.0969
_diffrn_reflns_av_sigmaI/netI    0.1253
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -26
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            32597
_diffrn_reflns_theta_full        26.82
_diffrn_reflns_theta_max         26.82
_diffrn_reflns_theta_min         3.13
_exptl_absorpt_coefficient_mu    1.928
_exptl_absorpt_correction_T_max  0.8006
_exptl_absorpt_correction_T_min  0.6247
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details
;
X-RED 1.31, Data Reduction for STAD4 and IPDS; X-Shape 2.07,
Crystal optimization for absorption correction, Stoe & Cie,
Darmstadt, 2005.
;
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.609
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2188
_exptl_crystal_size_max          0.24
_exptl_crystal_size_mid          0.22
_exptl_crystal_size_min          0.14
_refine_diff_density_max         0.988
_refine_diff_density_min         -0.783
_refine_diff_density_rms         0.160
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.43(5)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.063
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     958
_refine_ls_number_reflns         18921
_refine_ls_number_restraints     433
_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.1390
_refine_ls_R_factor_gt           0.0813
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0412P)^2^+39.0188P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1457
_refine_ls_wR_factor_ref         0.1711
_reflns_number_gt                12274
_reflns_number_total             18921
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1dt11247c.txt
_cod_data_source_block           Compound3
_cod_original_sg_symbol_H-M      P21
_cod_database_code               7017598