"Lock and key control" of photochromic reactivity by controlling the oxidation/reduction state.
Li, Xiaochuan; Ma, Yuzhen; Wang, Bingcai; Li, Gongan; Organic letters 10 (2008) 3639–3642; doi:10.1021/ol8013655

data_1504828
_publ_section_title
;
 &quot;Lock and key control&quot; of photochromic reactivity by
 controlling the oxidation/reduction state.
;
_journal_issue                   16
_journal_name_full               'Organic letters'
_journal_page_first              3639
_journal_page_last               3642
_journal_paper_doi               10.1021/ol8013655
_journal_volume                  10
_journal_year                    2008
_chemical_formula_sum            'C18 H14 S3'
_chemical_formula_weight         326.47
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 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                 103.8370(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   10.4475(10)
_cell_length_b                   8.2843(8)
_cell_length_c                   19.3730(19)
_cell_measurement_reflns_used    4860
_cell_measurement_temperature    291(2)
_cell_measurement_theta_max      27.76
_cell_measurement_theta_min      2.46
_cell_volume                     1628.1(3)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_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      291(2)
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.979
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and 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  0.0140
_diffrn_reflns_av_sigmaI/netI    0.0131
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            10481
_diffrn_reflns_theta_full        25.50
_diffrn_reflns_theta_max         25.50
_diffrn_reflns_theta_min         2.58
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.445
_exptl_absorpt_correction_T_max  0.8806
_exptl_absorpt_correction_T_min  0.8438
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.332
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             680
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.31
_exptl_crystal_size_min          0.29
_refine_diff_density_max         0.195
_refine_diff_density_min         -0.257
_refine_diff_density_rms         0.034
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.056
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     192
_refine_ls_number_reflns         2965
_refine_ls_number_restraints     167
_refine_ls_restrained_S_all      1.028
_refine_ls_R_factor_all          0.0393
_refine_ls_R_factor_gt           0.0332
_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^)+(0.0436P)^2^+0.6122P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0899
_refine_ls_wR_factor_ref         0.0950
_reflns_number_gt                2581
_reflns_number_total             2965
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ol8013655-file002.cif
_cod_data_source_block           a
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/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_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      P2(1)/c
_cod_database_code               1504828