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_7017597
_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            'C18 H64 B20 Cl2 N2 Sn4'
_chemical_formula_weight         1070.57
_chemical_name_systematic
;
?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.417(6)
_cell_angle_beta                 101.725(6)
_cell_angle_gamma                104.461(6)
_cell_formula_units_Z            2
_cell_length_a                   8.5534(7)
_cell_length_b                   15.7761(12)
_cell_length_c                   16.5730(13)
_cell_measurement_reflns_used    18602
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.1
_cell_measurement_theta_min      2.16
_cell_volume                     2116.3(3)
_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 0.988
_diffrn_measured_fraction_theta_max 0.988
_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  0.0470
_diffrn_reflns_av_sigmaI/netI    0.0337
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       19
_diffrn_reflns_limit_k_min       -19
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -20
_diffrn_reflns_number            30667
_diffrn_reflns_theta_full        26.37
_diffrn_reflns_theta_max         26.37
_diffrn_reflns_theta_min         5.68
_exptl_absorpt_coefficient_mu    2.477
_exptl_absorpt_correction_T_max  0.8309
_exptl_absorpt_correction_T_min  0.5983
_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            colorless
_exptl_crystal_density_diffrn    1.680
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1040
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.957
_refine_diff_density_min         -0.904
_refine_diff_density_rms         0.090
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.057
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         8567
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.057
_refine_ls_R_factor_all          0.0410
_refine_ls_R_factor_gt           0.0302
_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^)+(0.0158P)^2^+3.5060P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0525
_refine_ls_wR_factor_ref         0.0549
_reflns_number_gt                7298
_reflns_number_total             8567
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1dt11247c.txt
_cod_data_source_block           Compound2
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7017597