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_4325743
_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 H58 K2 N24 O19, I2, 12(H2 O)'
_chemical_formula_sum            'C40 H82 I2 K2 N24 O31'
_chemical_formula_weight         1727.30
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           2
_symmetry_cell_setting           triclinic
_symmetry_space_group_name_Hall  '-P 1'
_symmetry_space_group_name_H-M   'P -1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                117.784(2)
_cell_angle_beta                 94.009(3)
_cell_angle_gamma                104.474(3)
_cell_formula_units_Z            1
_cell_length_a                   11.8214(14)
_cell_length_b                   12.9387(8)
_cell_length_c                   13.0732(8)
_cell_measurement_reflns_used    75
_cell_measurement_temperature    223(2)
_cell_measurement_theta_max      21.6
_cell_measurement_theta_min      2.34
_cell_volume                     1671.9(3)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      223(2)
_diffrn_measured_fraction_theta_full 0.965
_diffrn_measured_fraction_theta_max 0.965
_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  0.0389
_diffrn_reflns_av_sigmaI/netI    0.0446
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            18697
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.80
_exptl_absorpt_coefficient_mu    1.169
_exptl_absorpt_correction_T_max  0.7913
_exptl_absorpt_correction_T_min  0.7132
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Bruker, 2005)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.716
_exptl_crystal_description       prism
_exptl_crystal_F_000             882
_exptl_crystal_size_max          0.31
_exptl_crystal_size_mid          0.28
_exptl_crystal_size_min          0.21
_platon_squeeze_details
;
;
_refine_diff_density_max         0.565
_refine_diff_density_min         -1.035
_refine_diff_density_rms         0.094
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.069
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     416
_refine_ls_number_reflns         6349
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.069
_refine_ls_R_factor_all          0.0532
_refine_ls_R_factor_gt           0.0429
_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^)+(0.0658P)^2^+0.9859P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1141
_refine_ls_wR_factor_ref         0.1198
_reflns_number_gt                5218
_reflns_number_total             6349
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic200109s_si_003_06.cif
_cod_data_source_block           complex06
_cod_original_cell_volume        1671.9(2)
_cod_database_code               4325743