Syntheses and Characterization of Some Mixed Te/Se Polychalcogenide Anions [TemSen]2-
Perumal Sekar; James A. Ibers; Inorganic Chemistry 43 (2004) 5436–5441; doi:10.1021/ic040026h

data_4311807
_publ_section_title
;
 Syntheses and Characterization of Some Mixed Te/Se Polychalcogenide
 Anions [TemSen]2-
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5436
_journal_page_last               5441
_journal_paper_doi               10.1021/ic040026h
_journal_volume                  43
_journal_year                    2004
_chemical_formula_sum            'C96 H80 P4 Se4 Te4'
_chemical_formula_weight         2183.72
_chemical_name_systematic
;
   ?
;
_space_group_IT_number           2
_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                89.402(2)
_cell_angle_beta                 76.282(2)
_cell_angle_gamma                88.457(2)
_cell_formula_units_Z            2
_cell_length_a                   11.3455(14)
_cell_length_b                   19.420(2)
_cell_length_c                   20.000(3)
_cell_measurement_temperature    153(2)
_cell_volume                     4279.3(9)
_computing_cell_refinement       'SAINT (Bruker 2000)'
_computing_data_collection       'SMART (Bruker 2000)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'XP in SHELXTL'
_computing_structure_refinement  SHELXTL
_computing_structure_solution    'SHELXTL (Sheldrick, 2000)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.899
_diffrn_measured_fraction_theta_max 0.899
_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  0.0491
_diffrn_reflns_av_sigmaI/netI    0.0716
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -15
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            51531
_diffrn_reflns_theta_full        28.93
_diffrn_reflns_theta_max         28.93
_diffrn_reflns_theta_min         1.05
_exptl_absorpt_coefficient_mu    3.172
_exptl_absorpt_correction_T_max  0.6275
_exptl_absorpt_correction_T_min  0.4228
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.695
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2120
_exptl_crystal_size_max          0.360
_exptl_crystal_size_mid          0.164
_exptl_crystal_size_min          0.164
_refine_diff_density_max         5.010
_refine_diff_density_min         -2.987
_refine_diff_density_rms         0.240
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.496
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     983
_refine_ls_number_reflns         20334
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.496
_refine_ls_R_factor_all          0.1310
_refine_ls_R_factor_gt           0.0858
_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^)+(0.1000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2315
_refine_ls_wR_factor_ref         0.2544
_reflns_number_gt                13086
_reflns_number_total             20334
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic040026h_4.cif
_cod_data_source_block           '[PPh4]2[Te2Se2]_Compound4'
_cod_database_code               4311807