Difference of Coordination between Alkali- and Alkaline-Earth-Metal Ions to a Symmetrical α,α',δ,δ'-Tetramethylcucurbit[6]uril
Wen-Jian Chen; Da-Hai Yu; Xin Xiao; Yun-Qian Zhang; Qian-Jiang Zhu; Sai-Feng Xue; Zhu Tao; Gang Wei; Inorganic Chemistry 50 (2011) 6956–6964; doi:10.1021/ic200109s

data_4325749
_publ_section_title
;
 Difference of Coordination between Alkali- and Alkaline-Earth-Metal Ions
 to a Symmetrical \a,\a',\d,\d'-Tetramethylcucurbit[6]uril
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              6956
_journal_page_last               6964
_journal_paper_doi               10.1021/ic200109s
_journal_volume                  50
_journal_year                    2011
_chemical_formula_moiety         'C40 H56 N24 O18 Ba2 Cl2, Cl2, 8(H2 O)'
_chemical_formula_sum            'C40 H72 Ba2 Cl4 N24 O26'
_chemical_formula_weight         1721.70
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 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                 117.976(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   23.055(6)
_cell_length_b                   10.464(2)
_cell_length_c                   16.667(4)
_cell_measurement_reflns_used    68
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      22.3
_cell_measurement_theta_min      1.78
_cell_volume                     3551.0(14)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.983
_diffrn_measured_fraction_theta_max 0.983
_diffrn_measurement_device_type  'Bruker CCD Area Detector'
_diffrn_measurement_method       '\f and \w scan'
_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  0.0306
_diffrn_reflns_av_sigmaI/netI    0.0301
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -27
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       19
_diffrn_reflns_limit_l_min       -19
_diffrn_reflns_number            12059
_diffrn_reflns_theta_full        25.20
_diffrn_reflns_theta_max         25.20
_diffrn_reflns_theta_min         1.38
_exptl_absorpt_coefficient_mu    1.344
_exptl_absorpt_correction_T_max  0.7939
_exptl_absorpt_correction_T_min  0.7655
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2005)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.627
_exptl_crystal_description       block
_exptl_crystal_F_000             1756
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.18
_platon_squeeze_details
;
;
_refine_diff_density_max         0.658
_refine_diff_density_min         -0.521
_refine_diff_density_rms         0.092
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.118
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     239
_refine_ls_number_reflns         3335
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.118
_refine_ls_R_factor_all          0.0364
_refine_ls_R_factor_gt           0.0333
_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^)+(0.0499P)^2^+9.0717P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0927
_refine_ls_wR_factor_ref         0.0944
_reflns_number_gt                3032
_reflns_number_total             3335
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic200109s_si_003_12.cif
_cod_data_source_block           complex12
_cod_original_cell_volume        3551.1(14)
_cod_original_sg_symbol_H-M      'C 2/m'
_cod_database_code               4325749