HalHal interactions in a series of three isostructural salts of halogenated tetrathiafulvalenes. Contribution of the halogen atoms to the HOMO‒HOMO overlap interactions
Benoît Domercq; Thomas Devic; Marc Fourmigué; Pascale Auban-Senzier; Enric Canadell; J. Mater. Chem. 11 (2001) 1570–1575; doi:10.1039/b100103p

data_7204068
_publ_section_title
;
 HalHal interactions in a series of three isostructural salts of
 halogenated tetrathiafulvalenes. Contribution of the halogen atoms to
 the HOMO--HOMO overlap interactions
;
_journal_issue                   6
_journal_name_full               'J. Mater. Chem.'
_journal_page_first              1570
_journal_page_last               1575
_journal_paper_doi               10.1039/b100103p
_journal_volume                  11
_journal_year                    2001
_chemical_formula_moiety         (C8H4S6Br2)2IBr2
_chemical_formula_sum            'C16 H8 Br6 I S12'
_chemical_formula_weight         1191.30
_chemical_name_common            '(EDT-TTFBr2)2 IBr2'
_chemical_name_systematic
; 
Bis(3,4-dibromo-3',4'-ethylenedithiotetrathiafulvalene)
dibromoiodide 
;
_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                95.60(3)
_cell_angle_beta                 98.47(3)
_cell_angle_gamma                104.20(3)
_cell_formula_units_Z            1
_cell_length_a                   6.7026(13)
_cell_length_b                   7.4586(15)
_cell_length_c                   15.789(3)
_cell_measurement_reflns_used    5822
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.9
_cell_measurement_theta_min      2.65
_cell_volume                     749.5(3)
_computing_cell_refinement       'SELECT, CELL (Stoe-IPDS)'
_computing_data_collection       'EXPOSE (Stoe-IPDS)'
_computing_data_reduction        'INTEGRATE (Stoe-IPDS)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 6.66
_diffrn_measured_fraction_theta_full 0.927
_diffrn_measured_fraction_theta_max 0.927
_diffrn_measurement_device_type  'area detector'
_diffrn_measurement_method       'rotation, phi incr. 1.5 deg'
_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  0.0319
_diffrn_reflns_av_sigmaI/netI    0.0375
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            7378
_diffrn_reflns_theta_full        25.95
_diffrn_reflns_theta_max         25.95
_diffrn_reflns_theta_min         2.63
_exptl_absorpt_coefficient_mu    9.914
_exptl_absorpt_correction_T_max  0.1721
_exptl_absorpt_correction_T_min  0.0985
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SHELX XPREP'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    2.639
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'thick plate'
_exptl_crystal_F_000             559
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.07
_refine_diff_density_max         0.491
_refine_diff_density_min         -0.503
_refine_diff_density_rms         0.103
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.904
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     160
_refine_ls_number_reflns         2718
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.904
_refine_ls_R_factor_all          0.0372
_refine_ls_R_factor_gt           0.0250
_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^)+(0.0286P)^2^+0.0000P] where P==(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0504
_refine_ls_wR_factor_ref         0.0528
_reflns_number_gt                2154
_reflns_number_total             2718
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b100103p.txt
_cod_data_source_block           mf170eabs
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7204068