An unprecedented mu4-Sn2Se9 ligand: solvothermal syntheses and characterizations of novel lanthanum selenidostannates [{La(dien)2}4(mu4-Sn2Se9)(mu-Sn2Se6)]infinity and [La2(en)8(mu-Se2)]Sn2Se6.
Chen, Jiang-Fang; Jin, Qin-Yan; Pan, Ying-Li; Zhang, Yong; Jia, Ding-Xian; Chemical communications (Cambridge, England)  (2009) 7212–7214; doi:10.1039/b914603b

data_7105064
_publ_section_title
;
 An unprecedented mu4-Sn2Se9 ligand: solvothermal syntheses and
 characterizations of novel lanthanum selenidostannates
 [{La(dien)2}4(mu4-Sn2Se9)(mu-Sn2Se6)]infinity and
 [La2(en)8(mu-Se2)]Sn2Se6.
;
_journal_issue                   46
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              7212
_journal_page_last               7214
_journal_paper_doi               10.1039/b914603b
_journal_year                    2009
_chemical_formula_moiety         'C16 H64 La2 N16 Se8 Sn2'
_chemical_formula_sum            'C16 H64 La2 N16 Se8 Sn2'
_chemical_formula_weight         1627.72
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_Int_Tables_number      14
_symmetry_space_group_name_Hall  '-P 2yn'
_symmetry_space_group_name_H-M   'P 1 21/n 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                 90.599(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   10.0790(16)
_cell_length_b                   14.843(2)
_cell_length_c                   14.918(2)
_cell_measurement_reflns_used    7129
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      24.25
_cell_measurement_theta_min      3.1
_cell_volume                     2231.7(6)
_computing_cell_refinement       CrystalClear
_computing_data_collection       CrystalClear
_computing_data_reduction        CrystalStructure
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 7.31
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_diffrn_measurement_device_type  'Rigaku Mercury'
_diffrn_measurement_method       \w
_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  0.0875
_diffrn_reflns_av_sigmaI/netI    0.0679
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
_diffrn_reflns_number            17960
_diffrn_reflns_theta_full        24.25
_diffrn_reflns_theta_max         24.25
_diffrn_reflns_theta_min         3.06
_exptl_absorpt_coefficient_mu    9.539
_exptl_absorpt_correction_T_max  0.2786
_exptl_absorpt_correction_T_min  0.2514
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Jacobson, R. (1998) Private communication'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    2.422
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1516
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_refine_diff_density_max         1.397
_refine_diff_density_min         -1.353
_refine_diff_density_rms         0.277
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.128
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     194
_refine_ls_number_reflns         3564
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.128
_refine_ls_R_factor_all          0.0618
_refine_ls_R_factor_gt           0.0477
_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^)+(0.0000P)^2^+116.0293P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1103
_refine_ls_wR_factor_ref         0.1260
_reflns_number_gt                3076
_reflns_number_total             3564
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b914603b.txt
_cod_data_source_block           compound_2
_cod_original_sg_symbol_H-M      'P 21/n'
_cod_database_code               7105064