Direct relationship between intermolecular charge-transfer and charge-resonance complexes via structural changes in the arene donor with various π-acceptors
Maguères, Pierre Le; Lindeman, Sergey V.; Kochi, Jay K.; Journal of the Chemical Society, Perkin Transactions 2  (2001) 1180–; doi:10.1039/b009543p

data_7213453
_publ_section_title
;
 Direct relationship between intermolecular charge-transfer and
 charge-resonance complexes via structural changes in the arene donor with
 various \p-acceptors
;
_journal_issue                   7
_journal_name_full
'Journal of the Chemical Society, Perkin Transactions 2'
_journal_page_first              1180
_journal_paper_doi               10.1039/b009543p
_journal_year                    2001
_chemical_formula_moiety         '(C12 H18) (C6 O2 Cl4)'
_chemical_formula_sum            'C18 H18 Cl4 O2'
_chemical_formula_weight         408.12
_chemical_name_systematic
; 
Hexamethylbenzene Chloranil Molecular Complex 
;
_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
_cell_angle_alpha                90.00
_cell_angle_beta                 101.874(1)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   7.0658(1)
_cell_length_b                   8.6430(1)
_cell_length_c                   14.8612(3)
_cell_measurement_reflns_used    6325
_cell_measurement_temperature    123(2)
_cell_measurement_theta_max      36.1
_cell_measurement_theta_min      2.7
_cell_volume                     888.15(2)
_computing_cell_refinement       'SAINT V4.050 (Siemens, 1989-95)'
_computing_data_collection       'SMART V4.050 (Siemens, 1989-95)'
_computing_data_reduction        'SAINT & SADABS (Sheldrick, 1996)'
_computing_molecular_graphics    'XP V5.06 (Siemens, 1996)'
_computing_publication_material  'SHELXL-93 & XCIF V5.05 (Siemens, 1996)'
_computing_structure_refinement  'SHELXL-93 (Sheldrick, 1993)'
_computing_structure_solution    'SHELXS-86 (Sheldrick, 1990)'
_diffrn_ambient_temperature      123(2)
_diffrn_measurement_device       'Siemens SMART'
_diffrn_measurement_method
;
\w-scan, frame range 0.3 deg, hemisphere
;
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'normal-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0204
_diffrn_reflns_av_sigmaI/netI    0.0277
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       13
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            10533
_diffrn_reflns_theta_max         36.13
_diffrn_reflns_theta_min         2.74
_diffrn_standards_decay_%        2.00
_diffrn_standards_number         360
_exptl_absorpt_coefficient_mu    0.674
_exptl_absorpt_correction_T_max  0.977
_exptl_absorpt_correction_T_min  0.873
_exptl_absorpt_correction_type   'empirical (SADABS procedure)'
_exptl_crystal_colour            'dark red'
_exptl_crystal_density_diffrn    1.526
_exptl_crystal_density_method    none
_exptl_crystal_description       prism
_exptl_crystal_F_000             420
_exptl_crystal_size_max          0.30
_exptl_crystal_size_mid          0.10
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.535
_refine_diff_density_min         -0.411
_refine_diff_density_rms         0.066
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.039
_refine_ls_goodness_of_fit_obs   1.055
_refine_ls_hydrogen_treatment
;
riding and rotating model with U~iso~=1.2U~eq/iso~ of an adjacent atom
(1.5U~eq/iso~ for methyl hydrogens)
;
_refine_ls_matrix_type           full
_refine_ls_number_parameters     112
_refine_ls_number_reflns         3921
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.105
_refine_ls_restrained_S_obs      1.055
_refine_ls_R_factor_all          0.0529
_refine_ls_R_factor_obs          0.0368
_refine_ls_shift/esd_max         0.000
_refine_ls_shift/esd_mean        0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0465P)^2^+0.2797P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.1039
_refine_ls_wR_factor_obs         0.0883
_reflns_number_observed          3116
_reflns_number_total             3933
_reflns_observed_criterion       >2sigma(I)
_cod_data_source_file            b009543psup1.cif
_cod_data_source_block           juer-fs
_cod_depositor_comments
;
The following automatic conversions were performed:

'_refine_ls_weighting_scheme' value 'calc
w=1/[\s^2^(Fo^2^)+(0.0465P)^2^+0.2797P] where P=(Fo^2^+2Fc^2^)/3' was
changed to 'calc'. New tag '_refine_ls_weighting_details' was
created. The value of the new tag was set to
'w=1/[\s^2^(Fo^2^)+(0.0465P)^2^+0.2797P] where P=(Fo^2^+2Fc^2^)/3'.

Automatic conversion script
Id: cif_fix_values 3143 2015-03-26 13:38:13Z robertas 
;
_cod_original_sg_symbol_H-M      P2(1)/n
_cod_database_code               7213453