Interaction of a symmetrical α,α′,δ,δ′-tetramethyl-cucurbit[6]uril with Ln3+: potential applications for isolation of lanthanides
Yang, Bo; Gao, Zhong-Zheng; Lu, Ji-Hong; Zhu, Qian-Jiang; Xue, Sai-Feng; Tao, Zhu; Prior, Timothy J.; Redshaw, Carl; Wei, Gang; Xiao, Xin; CrystEngComm 18 (2016) 5028–; doi:10.1039/C6CE00134C

data_7225424
_publ_section_title
;
 Interaction of a symmetrical
 \a,\a&#x2032;,\d,\d&#x2032;-tetramethyl-cucurbit[6]uril with Ln3+:
 potential applications for isolation of lanthanides
;
_journal_issue                   26
_journal_name_full               CrystEngComm
_journal_page_first              5028
_journal_paper_doi               10.1039/C6CE00134C
_journal_volume                  18
_journal_year                    2016
_chemical_formula_sum            'C40 H44 N24 O20 Sm'
_chemical_formula_weight         1331.34
_space_group_crystal_system      monoclinic
_space_group_IT_number           12
_space_group_name_Hall           '-C 2y'
_space_group_name_H-M_alt        'C 1 2/m 1'
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_atom_sites_solution_hydrogens   geom
_audit_creation_method           SHELXL-2014/7
_audit_update_record
;
2016-05-31 deposited with the CCDC.
2016-06-02 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 115.685(4)
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   22.308(10)
_cell_length_b                   12.540(6)
_cell_length_c                   14.747(7)
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_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      24.13
_cell_measurement_theta_min      2.16
_cell_volume                     3718(3)
_computing_cell_refinement       'Bruker SMART'
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_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.985
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0379
_diffrn_reflns_av_unetI/netI     0.0422
_diffrn_reflns_Laue_measured_fraction_full 0.986
_diffrn_reflns_Laue_measured_fraction_max 0.985
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_diffrn_reflns_limit_h_min       -25
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -17
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_diffrn_reflns_point_group_measured_fraction_full 0.986
_diffrn_reflns_point_group_measured_fraction_max 0.985
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         25.249
_diffrn_reflns_theta_min         1.532
_exptl_absorpt_coefficient_mu    0.861
_exptl_absorpt_correction_T_max  0.826
_exptl_absorpt_correction_T_min  0.762
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            colourless
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_exptl_crystal_description       block
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_exptl_crystal_size_mid          0.230
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_refine_diff_density_min         -0.359
_refine_diff_density_rms         0.070
_refine_ls_extinction_method     none
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_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
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_refine_ls_number_reflns         3482
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.121
_refine_ls_R_factor_all          0.0377
_refine_ls_R_factor_gt           0.0354
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.0518P)^2^+3.2968P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0993
_refine_ls_wR_factor_ref         0.1017
_reflns_Friedel_coverage         0.000
_reflns_number_gt                3323
_reflns_number_total             3482
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6ce00134c2.cif
_cod_data_source_block           6
_cod_depositor_comments
'Adding full bibliography for 7225407--7225427.cif.'
_cod_database_code               7225424
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.801
_shelx_estimated_absorpt_t_max   0.853
_shelx_res_checksum              96242
_shelx_fab_checksum              29767