Electrophilic halogenation of thioethers: 5-chloro- and 5,6-dichloro-5,6-dihydro-1,3-dithiolo[4,5-b][1,4]dithiine-2-one and an efficient synthesis of vinylenedithiotetrathiafulvalene (VDT-TTF)
Dautel, Olivier J.; Larsen, Jan; Fourmigué, Marc; Chemical Communications  (2000) 1117–; doi:10.1039/b001996h

data_7110923
_publ_section_title
;
 Electrophilic halogenation of thioethers: 5-chloro- and
 5,6-dichloro-5,6-dihydro-1,3-dithiolo[4,5-b][1,4]dithiine-2-one and an
 efficient synthesis of vinylenedithiotetrathiafulvalene (VDT-TTF)
;
_journal_issue                   13
_journal_name_full               'Chemical Communications'
_journal_page_first              1117
_journal_paper_doi               10.1039/b001996h
_journal_year                    2000
_chemical_formula_sum            'C8 H4 S6'
_chemical_formula_weight         292.47
_chemical_melting_point          185
_chemical_name_common            VDT-TTF
_chemical_name_systematic
; 
2-[1,3]dithiol-2-ylidene-[1,3]dithiolo[4,5-b][1,4]dithiine
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_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                 93.58(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.4203(13)
_cell_length_b                   14.905(3)
_cell_length_c                   11.648(2)
_cell_measurement_reflns_used    7040
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      25.85
_cell_measurement_theta_min      2.2
_cell_volume                     1112.5(4)
_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 0.996
_diffrn_measured_fraction_theta_max 0.996
_diffrn_measurement_device_type  STOE-IPDS
_diffrn_measurement_method       'Oscillation, Phi incr.= 1.6'
_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  0.0515
_diffrn_reflns_av_sigmaI/netI    0.0451
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -7
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            8649
_diffrn_reflns_theta_full        25.85
_diffrn_reflns_theta_max         25.85
_diffrn_reflns_theta_min         2.22
_exptl_absorpt_coefficient_mu    1.182
_exptl_absorpt_correction_T_max  0.8721
_exptl_absorpt_correction_T_min  0.6433
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'FACEIT, STOE-IPDS'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.746
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       platelet
_exptl_crystal_F_000             592
_exptl_crystal_size_max          0.5006
_exptl_crystal_size_mid          0.3466
_exptl_crystal_size_min          0.1156
_refine_diff_density_max         0.296
_refine_diff_density_min         -0.177
_refine_diff_density_rms         0.058
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.886
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     143
_refine_ls_number_reflns         2142
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.886
_refine_ls_R_factor_all          0.0412
_refine_ls_R_factor_gt           0.0268
_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^)+(0.0236P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0565
_refine_ls_wR_factor_ref         0.0590
_reflns_number_gt                1587
_reflns_number_total             2142
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b001996hsup1.cif
_cod_data_source_block           dop205bmer
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_crystal_density_meas' value 'not measured' was changed to '?'
- the value is perceived as not measured.

Automatic conversion script
Id: cif_fix_values 3008 2015-01-20 13:52:24Z robertas 
;
_cod_original_cell_volume        1112.4(4)
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7110923