Photochromism of a novel 6pi conjugate system having a bis(2,3'-benzothienyl) unit.
Yamaguchi, Tadatsugu; Fujita, Yuji; Irie, Masahiro; Chemical communications (Cambridge, England)  (2004) 1010–1011; doi:10.1039/b401207k

data_7102593
_publ_section_title
;
 Photochromism of a novel 6pi conjugate system having a
 bis(2,3'-benzothienyl) unit.
;
_journal_issue                   8
_journal_name_full               'Chemical communications (Cambridge, England)'
_journal_page_first              1010
_journal_page_last               1011
_journal_paper_doi               10.1039/b401207k
_journal_year                    2004
_chemical_formula_sum            'C23 H14 F6 O S2'
_chemical_formula_weight         484.46
_chemical_melting_point          127.5(5)
_chemical_name_common
;1-(2-(2-methylbenzothien-3-yl)benzothien-3-yl)-2-
methoxyhexafluorocyclopentene
;
_chemical_name_systematic
;
1-(2-(2-methylbenzothien-3-yl)benzothien-3-yl)-2-
methoxyhexafluorocyclopentene
;
_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           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 105.080(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   15.459(3)
_cell_length_b                   7.6854(16)
_cell_length_c                   18.589(4)
_cell_measurement_temperature    123(2)
_cell_volume                     2132.5(8)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SHELXTL'
_computing_molecular_graphics    'Bruker SHELXL'
_computing_publication_material  'Bruker SHELXL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.937
_diffrn_measured_fraction_theta_max 0.937
_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  0.0744
_diffrn_reflns_av_sigmaI/netI    0.0421
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       23
_diffrn_reflns_limit_l_min       -23
_diffrn_reflns_number            18505
_diffrn_reflns_theta_full        27.24
_diffrn_reflns_theta_max         27.24
_diffrn_reflns_theta_min         1.53
_exptl_absorpt_coefficient_mu    0.315
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.509
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             984
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.3
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.724
_refine_diff_density_min         -0.502
_refine_diff_density_rms         0.084
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.087
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     318
_refine_ls_number_reflns         4460
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.087
_refine_ls_R_factor_all          0.0566
_refine_ls_R_factor_gt           0.0464
_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^)+(0.0654P)^2^+1.4085P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1179
_refine_ls_wR_factor_ref         0.1313
_reflns_number_gt                3749
_reflns_number_total             4460
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b401207k.txt
_cod_data_source_block           yanaome
_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_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_chemical_melting_point' value '127-128' was changed to '127.5(5)' -
the average value was taken and precision was estimated.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_sg_symbol_H-M      P21/n
_cod_database_code               7102593