TeX4 (X = F, Cl, Br) as Lewis acids‒complexes with soft thio- and seleno-ether ligands.
Hector, Andrew L.; Jolleys, Andrew; Levason, William; Reid, Gillian; Dalton transactions (Cambridge, England : 2003) 41 (2012) 10988–10999; doi:10.1039/c2dt30968h

data_7020210
_publ_section_title
;
 TeX4 (X = F, Cl, Br) as Lewis acids--complexes with soft thio- and
 seleno-ether ligands.
;
_journal_issue                   36
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              10988
_journal_page_last               10999
_journal_paper_doi               10.1039/c2dt30968h
_journal_volume                  41
_journal_year                    2012
_chemical_formula_moiety         'C4 H12 Br2 O Te2, 0.6(C H2 Cl2)'
_chemical_formula_sum            'C4.6 H13.2 Br2 Cl1.2 O Te2'
_chemical_formula_weight         542.11
_chemical_name_systematic
;
1,3-dibromo-1,1,3,3-tetramethyl-1\l^4^,3\l^4^-ditelluroxane
dichloromethane solvate
;
_space_group_IT_number           230
_space_group_name_Hall           '-I 4bd 2c 3'
_symmetry_cell_setting           cubic
_symmetry_space_group_name_Hall  '-I 4bd 2c 3'
_symmetry_space_group_name_H-M   'I a -3 d'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_date             2012-02-23
_audit_creation_method           'SHELXL-97 + hand edit'
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            48
_cell_length_a                   25.509(3)
_cell_length_b                   25.509(3)
_cell_length_c                   25.509(3)
_cell_measurement_reflns_used    27804
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.5
_cell_measurement_theta_min      3.2
_cell_volume                     16599(3)
_computing_cell_refinement
'CrystalClear-SM Expert 2.0 r7 (Rigaku, 2011)'
_computing_data_collection
'CrystalClear-SM Expert 2.0 r7 (Rigaku, 2011)'
_computing_data_reduction
'CrystalClear-SM Expert 2.0 r7 (Rigaku, 2011)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector                 'CCD plate'
_diffrn_detector_type            'Rigaku HG Saturn724+ (2x2 bin mode)'
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device       'Four-circle \k diffractometer'
_diffrn_measurement_device_type  'Rigaku AFC12 '
_diffrn_measurement_method       'Profile data from \w-scans'
_diffrn_radiation_collimation    'Confocal mirrors, VHF VariMax '
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0258
_diffrn_reflns_av_sigmaI/netI    0.0110
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -27
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -33
_diffrn_reflns_number            34117
_diffrn_reflns_theta_full        27.46
_diffrn_reflns_theta_max         27.46
_diffrn_reflns_theta_min         3.19
_diffrn_source                   'Rotating anode X-ray tube'
_diffrn_source_type              'Rigaku FR-E+ Superbright'
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    10.187
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.731
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;Jacobson, R.A. (1998). REQAB. Private communication to the
Rigaku Corporation, Tokyo, Japan.
;
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.603
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             11674
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_refine_diff_density_max         1.965
_refine_diff_density_min         -2.781
_refine_diff_density_rms         0.166
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.047
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     54
_refine_ls_number_reflns         1585
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.047
_refine_ls_R_factor_all          0.0312
_refine_ls_R_factor_gt           0.0291
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0374P)^2^+285.4000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0766
_refine_ls_wR_factor_ref         0.0778
_reflns_number_gt                1470
_reflns_number_total             1585
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            c2dt30968h.txt
_cod_data_source_block           11aj004r
_cod_original_cell_volume        16599(4)
_cod_original_formula_sum        'C4.60 H13.20 Br2 Cl1.20 O Te2'
_cod_database_code               7020210