Synthesis and crystal engineering of new halogenated tetrathiafulvalene (TTF) derivatives and their charge transfer complexes and radical ion salts
Batsanov, Andrei S.; Bryce, Martin R.; Chesney, Antony; Howard, Judith A. K.; John, Derek E.; Moore, Adrian J.; Wood, Clare L.; Gershtenman, Hagit; Becker, James Y.; Khodorkovsky, Vladimir Y.; Ellern, Arkady; Bernstein, Joel; Perepichka, Igor F.; Rotello, Vincent; Gray, Mark; Cuello, Alejandro O.; Journal of Materials Chemistry 11 (2001) 2181–; doi:10.1039/b101866n

data_7204120
_publ_section_title
;
 Synthesis and crystal engineering of new halogenated
 tetrathiafulvalene (TTF) derivatives and their charge transfer
 complexes and radical ion salts
;
_journal_issue                   9
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              2181
_journal_paper_doi               10.1039/b101866n
_journal_volume                  11
_journal_year                    2001
_chemical_formula_sum            'C12 H8 Br2 N2 S6'
_chemical_formula_weight         532.38
_chemical_melting_point          406.1(10)
_chemical_name_systematic
; 4,5-dibromo-4',5'-bis(2'-cyanoethylsulfanyl)- 
tetrathiafulvalene 
;
_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   difmap
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   14.609(1)
_cell_length_b                   11.607(1)
_cell_length_c                   21.020(1)
_cell_measurement_reflns_used    262
_cell_measurement_temperature    150(2)
_cell_measurement_theta_max      25.9
_cell_measurement_theta_min      12.1
_cell_volume                     3564.3(4)
_computing_cell_refinement       'Siemens SMART'
_computing_data_collection       'Siemens SMART'
_computing_data_reduction        'Siemens SAINT'
_computing_molecular_graphics    'Siemens SHELXTL'
_computing_publication_material  'Siemens SHELXTL'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      150(2)
_diffrn_measurement_device       'SMART 1K CCD area detector'
_diffrn_measurement_method       '\w scan'
_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  0.0566
_diffrn_reflns_av_sigmaI/netI    0.0300
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -20
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       28
_diffrn_reflns_limit_l_min       -27
_diffrn_reflns_number            27012
_diffrn_reflns_theta_max         30.48
_diffrn_reflns_theta_min         1.94
_diffrn_standards_decay_%        0.1
_exptl_absorpt_coefficient_mu    5.246
_exptl_absorpt_correction_T_max  0.3664
_exptl_absorpt_correction_T_min  0.1762
_exptl_absorpt_correction_type   integration
_exptl_crystal_colour            scarlet
_exptl_crystal_density_diffrn    1.984
_exptl_crystal_description       block
_exptl_crystal_F_000             2080
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.30
_exptl_crystal_size_min          0.25
_refine_diff_density_max         .387
_refine_diff_density_min         -.552
_refine_diff_density_rms         .103
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.209
_refine_ls_goodness_of_fit_obs   1.185
_refine_ls_hydrogen_treatment    refall
_refine_ls_matrix_type           full
_refine_ls_number_parameters     231
_refine_ls_number_reflns         5086
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.247
_refine_ls_restrained_S_obs      1.185
_refine_ls_R_factor_all          0.0411
_refine_ls_R_factor_obs          0.0291
_refine_ls_shift/esd_max         -0.001
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0113P)^2^+4.2021P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0655
_refine_ls_wR_factor_obs         0.0571
_reflns_number_observed          4324
_reflns_number_total             5108
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            b101866n.txt
_cod_data_source_block           15
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
according to '/home/adriana/struct/CIF-dictionaries/cif_core.dic'
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_enum 1555 2011-01-17 13:19:09Z saulius 

The following automatic conversions were performed:

'_chemical_melting_point' value '132--134\% C' was changed to
'406.1(10)' - it was converted from degrees Celsius(C) to Kelvins(K),
the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1569 2011-02-09 13:29:24Z adriana 

The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0113P)^2^+4.2021P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0113P)^2^+4.2021P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      'Pbca '
_cod_database_code               7204120