C—I···NC halogen bonding in two polymorphs of the mixed-valence 2:1 charge-transfer salt (EDT-TTF-I~2~)~2~(TCNQF~4~), with segregated <i>versus</i> alternated stacks
Lieffrig, Julien; Jeannin, Olivier; Vacher, Antoine; Lorcy, Dominique; Auban-Senzier, Pascale; Fourmigué, Marc; Acta Crystallographica Section B 70 (2014) 141–148; doi:10.1107/S2052520613032629

data_2105776
_publ_section_title
;
 C---I&#x00B7;&#x00B7;&#x00B7;NC halogen bonding in two polymorphs of the
 mixed-valence 2:1 charge-transfer salt (EDT-TTF-I~2~)~2~(TCNQF~4~), with
 segregated <i>versus</i> alternated stacks
;
_journal_coeditor_code           BI5028
_journal_issue                   1
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              141
_journal_page_last               148
_journal_paper_doi               10.1107/S2052520613032629
_journal_volume                  70
_journal_year                    2014
_chemical_formula_moiety         'C12 H8 I2 N2 S6'
_chemical_formula_sum            'C12 H8 I2 N2 S6'
_chemical_formula_weight         626.36
_space_group_IT_number           61
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2ab'
_symmetry_space_group_name_H-M   'P b c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.6070(4)
_cell_length_b                   12.0315(3)
_cell_length_c                   20.9654(7)
_cell_measurement_reflns_used    5889
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      27.37
_cell_measurement_theta_min      3.26
_cell_volume                     3684.55(18)
_computing_cell_refinement       'SAINT (Bruker, 2003)'
_computing_data_collection       'APEX2 (Bruker, 2005)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'DIAMOND (Brandenburg & Brendt, 2001)'
_computing_publication_material  'WinGX (Farrugia, 2012)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SIR-97 (Altomare et al., 1999)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  'Bruker APEX-II CCD'
_diffrn_measurement_method       '\w scans'
_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  0.0374
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            15787
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.4
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    4.089
_exptl_absorpt_correction_T_max  0.520
_exptl_absorpt_correction_T_min  0.353
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2003)'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    2.258
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             2368
_exptl_crystal_size_max          0.28
_exptl_crystal_size_mid          0.19
_exptl_crystal_size_min          0.16
_refine_diff_density_max         1.167
_refine_diff_density_min         -1.174
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.072
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     199
_refine_ls_number_reflns         4208
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.072
_refine_ls_R_factor_all          0.0386
_refine_ls_R_factor_gt           0.0301
_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^)+(0.0222P)^2^+2.9001P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0595
_refine_ls_wR_factor_ref         0.0625
_reflns_number_gt                3600
_reflns_number_total             4208
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            bi5028sup1.cif
_cod_data_source_block           NCCH22S2TTFI2
_cod_database_code               2105776