On the origin of the solid-state thermochromism and thermal fatigue of polycyclic overcrowded enes.
Naumov, Panče; Ishizawa, Nobuo; Wang, Jun; Pejov, Ljupčo; Pumera, Martin; Lee, Sang Cheol; The journal of physical chemistry. A 115 (2011) 8563–8570; doi:10.1021/jp2040339

data_1501737
_publ_section_title
;
 On the origin of the solid-state thermochromism and thermal fatigue of
 polycyclic overcrowded enes.
;
_journal_issue                   30
_journal_name_full               'The journal of physical chemistry. A'
_journal_page_first              8563
_journal_page_last               8570
_journal_paper_doi               10.1021/jp2040339
_journal_volume                  115
_journal_year                    2011
_chemical_formula_moiety         'C22 H12 O2 S'
_chemical_formula_sum            'C22 H12 O2 S'
_chemical_formula_weight         340.38
_chemical_name_systematic
;
 2-(thioxanthen-9-ylidene)indane-1,3-dione
;
_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           'Manual editing of SHELXL-97'
_cell_angle_alpha                90.00
_cell_angle_beta                 94.60(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.656(3)
_cell_length_b                   8.247(2)
_cell_length_c                   21.156(6)
_cell_measurement_temperature    487(2)
_cell_volume                     1679.3(8)
_computing_cell_refinement       'APEX2-W2K/NT (Bruker, 2006)'
_computing_data_collection       'APEX2-W2K/NT (Bruker, 2006)'
_computing_data_reduction        'APEX2-W2K/NT (Bruker, 2006)'
_computing_molecular_graphics    'DIAMOND (Brandenburg, 2005)'
_computing_publication_material  'WinGX (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      487(2)
_diffrn_measured_fraction_theta_full 0.993
_diffrn_measured_fraction_theta_max 0.993
_diffrn_measurement_device_type  'Bruker APEX diffractometer'
_diffrn_measurement_method       '\w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0810
_diffrn_reflns_av_sigmaI/netI    0.0943
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            7183
_diffrn_reflns_theta_full        23.30
_diffrn_reflns_theta_max         23.30
_diffrn_reflns_theta_min         1.93
_exptl_absorpt_coefficient_mu    0.204
_exptl_absorpt_correction_T_max  0.9799
_exptl_absorpt_correction_T_min  0.9642
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'APEX2-W2K/NT (Bruker, 2006)'
_exptl_crystal_colour            red
_exptl_crystal_density_diffrn    1.346
_exptl_crystal_density_meas      ?
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             704
_exptl_crystal_size_max          0.18
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.130
_refine_diff_density_min         -0.147
_refine_diff_density_rms         0.033
_refine_ls_extinction_coef       0.0023(13)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.980
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     227
_refine_ls_number_reflns         2409
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.980
_refine_ls_R_factor_all          0.1810
_refine_ls_R_factor_gt           0.0564
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0601P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1157
_refine_ls_wR_factor_ref         0.1704
_reflns_number_gt                891
_reflns_number_total             2409
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            jp2040339_si_008.cif
_cod_data_source_block           PN_C1_test11_200
_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 

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        1679.2(8)
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               1501737