Photodimerization Mechanism of Bis(3,4,5-trifluorobenzyl) (E,E)-Muconate in a Columnar Assembly in the Crystalline State
Mori, Yutaka; Matsumoto, Akikazu; Chemistry Letters 36 (2007) 510–; doi:10.1246/cl.2007.510

data_8000163
_publ_section_title
;
 Photodimerization Mechanism of Bis(3,4,5-trifluorobenzyl) (E,E)-Muconate
 in a Columnar Assembly in the Crystalline State
;
_journal_issue                   4
_journal_name_full               'Chemistry Letters'
_journal_page_first              510
_journal_paper_doi               10.1246/cl.2007.510
_journal_volume                  36
_journal_year                    2007
_chemical_formula_moiety         'C20 H12 F6 O4 '
_chemical_formula_sum            'C20 H12 F6 O4'
_chemical_formula_weight         430.30
_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                 96.784(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   3.966(2)
_cell_length_b                   20.041(10)
_cell_length_c                   11.556(6)
_cell_measurement_reflns_used    6747
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.6
_cell_measurement_theta_min      3.0
_cell_volume                     912.1(8)
_computing_cell_refinement       PROCESS-AUTO
_computing_data_collection       PROCESS-AUTO
_computing_data_reduction        CrystalStructure
_computing_publication_material  'CrystalStructure 3.8.0'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_detector_area_resol_mean 10.00
_diffrn_measured_fraction_theta_full 0.998
_diffrn_measured_fraction_theta_max 0.998
_diffrn_measurement_device_type  'Rigaku RAXIS-RAPID'
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71075
_diffrn_reflns_av_R_equivalents  0.0451
_diffrn_reflns_av_sigmaI/netI    0.0354
_diffrn_reflns_limit_h_max       4
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       26
_diffrn_reflns_limit_k_min       -25
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            8431
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         3.53
_exptl_absorpt_coefficient_mu    0.148
_exptl_absorpt_correction_T_max  0.9853
_exptl_absorpt_correction_T_min  0.9362
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.567
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             436
_exptl_crystal_size_max          0.45
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.378
_refine_diff_density_min         -0.248
_refine_diff_density_rms         0.069
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.082
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     137
_refine_ls_number_reflns         2079
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.082
_refine_ls_R_factor_all          0.1015
_refine_ls_R_factor_gt           0.0697
_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^)+(0.0902P)^2^+0.6550P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1943
_refine_ls_wR_factor_ref         0.2075
_reflns_number_gt                1333
_reflns_number_total             2079
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            36-510sup1.cif
_cod_data_source_block           0
_cod_original_cell_volume        912.0(8)
_cod_database_code               8000163