The first bridged 9,10-bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene derivatives: strained redox-active cyclophanes
Finn, Terry; Bryce, Martin R.; Batsanov, Andrei S.; Howard, Judith A. K.; Chemical Communications  (1999) 1835–; doi:10.1039/a905938e

data_7110662
_publ_section_title
;
 The first bridged 9,10-bis(1,3-dithiol-2-ylidene)-9,10-dihydroanthracene
 derivatives: strained redox-active cyclophanes
;
_journal_issue                   18
_journal_name_full               'Chemical Communications'
_journal_page_first              1835
_journal_paper_doi               10.1039/a905938e
_journal_year                    1999
_chemical_formula_sum            'C28 H26 S6'
_chemical_formula_weight         554.85
_space_group_IT_number           33
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2c -2n'
_symmetry_space_group_name_H-M   'P n a 21'
_atom_sites_solution_hydrogens   difmap
_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                   19.231(2)
_cell_length_b                   9.520(1)
_cell_length_c                   30.089(3)
_cell_measurement_reflns_used    642
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      18
_cell_measurement_theta_min      10
_cell_volume                     5508.7(10)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 8
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'omega 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  0.0817
_diffrn_reflns_av_sigmaI/netI    0.0814
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       35
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            31379
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         2.12
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    0.513
_exptl_absorpt_correction_T_max  0.9534
_exptl_absorpt_correction_T_min  0.9081
_exptl_absorpt_correction_type   integration
_exptl_absorpt_process_details
'XPREP (SHELX-97) program, before correction R(int)=0.083'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    1.338
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'hexagon prism'
_exptl_crystal_F_000             2320
_exptl_crystal_size_max          0.44
_exptl_crystal_size_mid          0.12
_exptl_crystal_size_min          0.11
_refine_diff_density_max         0.215
_refine_diff_density_min         -0.208
_refine_diff_density_rms         0.049
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   -0.15(9)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.000
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     617
_refine_ls_number_reflns         9683
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.1108
_refine_ls_R_factor_gt           0.0487
_refine_ls_shift/su_max          0.011
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0367P)^2^+0.8116P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0816
_refine_ls_wR_factor_ref         0.0993
_reflns_number_gt                5758
_reflns_number_total             9683
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            905938esup1.cif
_cod_data_source_block           beta-3
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1891 2012-01-12 08:04:46Z andrius 
;
_cod_original_cell_volume        5509(1)
_cod_original_sg_symbol_H-M      Pna2(1)
_cod_database_code               7110662