Electronic structures of intermolecular charge-transfer states in fast electron transfers with tetrathiafulvalene donor. Thermal and photoactivation of [2 + 4] cycloaddition to o-chloranil acceptor.
Rosokha, S. V.; Dibrov, S. M.; Rosokha, T. Y.; Kochi, J. K.; Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 5 (2006) 914–924; doi:10.1039/b607431f

data_1516178
_publ_section_title
;
 Electronic structures of intermolecular charge-transfer states in fast
 electron transfers with tetrathiafulvalene donor. Thermal and
 photoactivation of [2 + 4] cycloaddition to o-chloranil acceptor.
;
_journal_issue                   10
_journal_name_full
'Photochemical &amp; photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology'
_journal_page_first              914
_journal_page_last               924
_journal_paper_doi               10.1039/b607431f
_journal_volume                  5
_journal_year                    2006
_chemical_formula_moiety         'C6 Cl4 O2'
_chemical_formula_sum            'C6 Cl4 O2'
_chemical_formula_weight         245.86
_chemical_name_systematic
;
tetrachloro-o-benzoquinone
;
_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                 94.2490(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   6.0592(4)
_cell_length_b                   16.3472(11)
_cell_length_c                   8.1183(6)
_cell_measurement_reflns_used    5251
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      31.74
_cell_measurement_theta_min      2.49
_cell_volume                     801.92(10)
_computing_cell_refinement       'SAINT V6.28 (BrukerAXS, 1997-2001)'
_computing_data_collection       'SMART V5.630 (BrukerAXS, 1997-2001)'
_computing_data_reduction        'SAINT & SADABS V2.06 (Sheldrick, 2000)'
_computing_molecular_graphics    'XP V5.06 (BrukerAXS, 1997-99)'
_computing_publication_material  'SHELXL-93, XCIF V5.05 (BrukerAXS, 1997-99)'
_computing_structure_refinement  'SHELXTL v. 6.12 (Sheldrick, 2001)'
_computing_structure_solution    'SHELXTL v. 6.12 (Sheldrick, 2001)'
_diffrn_ambient_temperature      123(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.946
_diffrn_measurement_device       'Siemens SMART'
_diffrn_measurement_method
;
\w-scan, frame range 0.3 deg, hemisphere
;
_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  0.0307
_diffrn_reflns_av_sigmaI/netI    0.0275
_diffrn_reflns_limit_h_max       8
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       24
_diffrn_reflns_limit_k_min       -23
_diffrn_reflns_limit_l_max       11
_diffrn_reflns_limit_l_min       -11
_diffrn_reflns_number            8492
_diffrn_reflns_theta_full        30.00
_diffrn_reflns_theta_max         31.76
_diffrn_reflns_theta_min         2.49
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    1.420
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Semi-empirical (SADABS procedure)'
_exptl_crystal_colour            dark-red
_exptl_crystal_density_diffrn    2.036
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       rod
_exptl_crystal_F_000             480
_exptl_crystal_size_max          0.3
_exptl_crystal_size_mid          0.2
_exptl_crystal_size_min          0.2
_refine_diff_density_max         0.938
_refine_diff_density_min         -0.504
_refine_diff_density_rms         0.158
_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     109
_refine_ls_number_reflns         2570
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.056
_refine_ls_R_factor_all          0.0434
_refine_ls_R_factor_gt           0.0393
_refine_ls_shift/su_max          0.010
_refine_ls_shift/su_mean         0.002
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0781P)^2^+0.0554P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1017
_refine_ls_wR_factor_ref         0.1057
_reflns_number_gt                2293
_reflns_number_total             2570
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b607431f.txt
_cod_data_source_block           ros-ts
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to
/usr/data/users/saulius/automatic-downloads/retrospective/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 2281 2013-09-26 08:29:07Z andrius 
;
_cod_original_sg_symbol_H-M      'P2(1)/c '
_cod_database_code               1516178