Anion-π Interactions: Generality, Binding Strength, and Structure
De-Xian Wang; Mei-Xiang Wang; Journal of the American Chemical Society 135 (2013) 892–897; doi:10.1021/ja310834w

data_4119186
_publ_section_title
;
 Anion-\p Interactions: Generality, Binding Strength, and Structure
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              892
_journal_page_last               897
_journal_paper_doi               10.1021/ja310834w
_journal_volume                  135
_journal_year                    2013
_chemical_formula_moiety         'C18 H8 Cl2 N6 O4, C8 H20 N, N O3'
_chemical_formula_sum            'C26 H28 Cl2 N8 O7'
_chemical_formula_weight         635.46
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           64
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-C 2ac 2'
_symmetry_space_group_name_H-M   'C m c a'
_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                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            16
_cell_length_a                   36.529(7)
_cell_length_b                   17.756(4)
_cell_length_c                   17.766(4)
_cell_measurement_reflns_used    1280
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      27.48
_cell_measurement_theta_min      2.17
_cell_volume                     11523(4)
_computing_cell_refinement       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_collection       'CrystalClear (Rigaku Inc., 2008)'
_computing_data_reduction        'CrystalClear (Rigaku Inc., 2008)'
_computing_molecular_graphics    'XP in Siemens SHELXTL (Sheldrick, 1994)'
_computing_publication_material  'SHELX97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 0.994
_diffrn_measured_fraction_theta_max 0.994
_diffrn_measurement_device_type  'Saturn724+ CCD'
_diffrn_measurement_method       '\w scans at fixed \c = 45\%'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0376
_diffrn_reflns_av_sigmaI/netI    0.0560
_diffrn_reflns_limit_h_max       28
_diffrn_reflns_limit_h_min       -43
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            18860
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.11
_exptl_absorpt_coefficient_mu    0.286
_exptl_absorpt_correction_T_max  0.9192
_exptl_absorpt_correction_T_min  0.8704
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'CrystalClear (Rigaku Inc., 2008)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.465
_exptl_crystal_description       block
_exptl_crystal_F_000             5280
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.43
_exptl_crystal_size_min          0.30
_refine_diff_density_max         0.488
_refine_diff_density_min         -0.379
_refine_diff_density_rms         0.056
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.221
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     433
_refine_ls_number_reflns         5129
_refine_ls_number_restraints     42
_refine_ls_restrained_S_all      1.257
_refine_ls_R_factor_all          0.0672
_refine_ls_R_factor_gt           0.0613
_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^)+(0.0513P)^2^+18.8711P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1411
_refine_ls_wR_factor_ref         0.1447
_reflns_number_gt                4748
_reflns_number_total             5129
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja310834w_si_002.cif
_cod_data_source_block           a
_cod_database_code               4119186