Photochromism of 1,2-Bis(2-ethyl-5-phenyl-3-thienyl)perfluorocyclopentene in a Single-Crystalline Phase. Conrotatory Thermal Cycloreversion of the Closed-Ring Isomer
Seiya Kobatake; Katsunori Shibata; Kingo Uchida; Masahiro Irie; Journal of the American Chemical Society 122 (2000) 12135–12141; doi:10.1021/ja001996g

data_4116264
_publ_contact_author
;
    Prof. Masahiro Irie
    Department of Chemistry and Biochemistry
    Graduate School of Engineering
    Kyushu University
    6-10-1 Hakozaki, Higashi-ku
    Fukuoka  812-8581, Japan
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_publ_contact_author_email       irie@cstf.kyushu-u.ac.jp
_publ_contact_author_fax         +81-92-642-3568
_publ_contact_author_phone       +81-92-642-3556
_publ_section_title
;
 Photochromism of 1,2-Bis(2-ethyl-5-phenyl-3-thienyl)perfluorocyclopentene
 in a Single-Crystalline Phase. Conrotatory Thermal Cycloreversion of the
 Closed-Ring Isomer
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12135
_journal_page_last               12141
_journal_paper_doi               10.1021/ja001996g
_journal_volume                  122
_journal_year                    2000
_chemical_formula_sum            'C29 H22 F6 S2'
_chemical_formula_weight         548.59
_chemical_name_systematic
'1,2-diethyl-8,8,9,9,10,10-hexafluoro-4,14-diphenyl-3,15-dithiatetracyclo-[10.3.0.0^2,6^.0^7,11^] pentadeca-4,6(7),11(12),13-tetraene and 1,2-bis(2-ethyl-5-phenyl-3-thienyl)perfluorocyclopentene'
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/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                 101.289(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            8
_cell_length_a                   29.804(4)
_cell_length_b                   12.3908(18)
_cell_length_c                   13.489(2)
_cell_measurement_reflns_used    3529
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      23.26
_cell_measurement_theta_min      1.39
_cell_volume                     4885.0(12)
_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      123(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'omega 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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0460
_diffrn_reflns_limit_h_max       32
_diffrn_reflns_limit_h_min       -33
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            3504
_diffrn_reflns_theta_full        23.26
_diffrn_reflns_theta_max         23.26
_diffrn_reflns_theta_min         1.39
_diffrn_standards_decay_%        0.2
_exptl_absorpt_coefficient_mu    0.282
_exptl_absorpt_correction_T_max  0.868
_exptl_absorpt_correction_T_min  0.817
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    1.492
_exptl_crystal_description       plate
_exptl_crystal_F_000             2256
_exptl_crystal_size_max          0.7
_exptl_crystal_size_mid          0.6
_exptl_crystal_size_min          0.5
_refine_diff_density_max         0.428
_refine_diff_density_min         -0.334
_refine_diff_density_rms         0.067
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.017
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     363
_refine_ls_number_reflns         3504
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.017
_refine_ls_R_factor_all          0.0767
_refine_ls_R_factor_gt           0.0459
_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^)+(0.0811P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1106
_refine_ls_wR_factor_ref         0.1277
_reflns_number_gt                2463
_reflns_number_total             3504
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja001996g_1.cif
_cod_data_source_block           heat1b
_cod_depositor_comments
;
 Correcting the _chemical_name_systematic data item value by replacing
 the '<', '>' symbols with the '^' symbol. This is the preferred way of
 denoting superscript symbols in CIF files.

 Antanas Vaitkus,
 2018-10-12
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_cod_database_code               4116264