Formation of a stannylstannylene via intramolecular carbene addition of a transient stannaacetylene (RSn[triple bond, length as m-dash]CR').
Setaka, Wataru; Hirai, Katsuyuki; Tomioka, Hideo; Sakamoto, Kenkichi; Kira, Mitsuo; Chemical communications (Cambridge, England)  (2008) 6558–6560; doi:10.1039/b814801e

data_7103609
_publ_section_title
;
 Formation of a stannylstannylene via intramolecular carbene addition
 of a transient stannaacetylene (RSn[triple bond, length as
 m-dash]CR').
;
_journal_issue                   48
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              6558
_journal_page_last               6560
_journal_paper_doi               10.1039/b814801e
_journal_year                    2008
_chemical_formula_moiety         'C80 H116 Si2 Sn2, 3(C6 H6)'
_chemical_formula_sum            'C98 H134 Si2 Sn2'
_chemical_formula_weight         1605.61
_chemical_name_common            stannylstannylene
_chemical_name_systematic
;
?
;
_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                 95.001(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.628(2)
_cell_length_b                   41.255(7)
_cell_length_c                   17.126(3)
_cell_measurement_temperature    220(2)
_cell_volume                     8888(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      220(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_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  0.1810
_diffrn_reflns_av_sigmaI/netI    0.2344
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       49
_diffrn_reflns_limit_k_min       -49
_diffrn_reflns_limit_l_max       20
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            46883
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         1.29
_exptl_absorpt_coefficient_mu    0.632
_exptl_absorpt_correction_T_max  0.8840
_exptl_absorpt_correction_T_min  0.7860
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_density_diffrn    1.200
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             3400
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.729
_refine_diff_density_min         -0.586
_refine_diff_density_rms         0.112
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.022
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     883
_refine_ls_number_reflns         15721
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.023
_refine_ls_R_factor_all          0.2410
_refine_ls_R_factor_gt           0.1150
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0932P)^2^+24.7492P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2204
_refine_ls_wR_factor_ref         0.2678
_reflns_number_gt                6792
_reflns_number_total             15721
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b814801e.txt
_cod_data_source_block           dimer
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7103609