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_7225423
_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 Cl2 N26 O29 Sm2'
_chemical_formula_weight         1724.61
_space_group_crystal_system      orthorhombic
_space_group_IT_number           53
_space_group_name_Hall           '-P 2ac 2'
_space_group_name_H-M_alt        'P m n a'
_symmetry_space_group_name_Hall  '-P 2ac 2'
_symmetry_space_group_name_H-M   'P m n a'
_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                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
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_cell_length_b                   10.726(4)
_cell_length_c                   14.392(5)
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_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      23.43
_cell_measurement_theta_min      2.37
_cell_volume                     3969(2)
_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 0.996
_diffrn_measured_fraction_theta_max 0.996
_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  0.0534
_diffrn_reflns_av_unetI/netI     0.0396
_diffrn_reflns_Laue_measured_fraction_full 0.996
_diffrn_reflns_Laue_measured_fraction_max 0.996
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_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       17
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            19851
_diffrn_reflns_point_group_measured_fraction_full 0.996
_diffrn_reflns_point_group_measured_fraction_max 0.996
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_diffrn_reflns_theta_max         25.248
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_exptl_absorpt_coefficient_mu    1.617
_exptl_absorpt_correction_T_max  0.720
_exptl_absorpt_correction_T_min  0.623
_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
_exptl_crystal_size_min          0.190
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_refine_ls_extinction_method     none
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_refine_ls_restrained_S_all      1.055
_refine_ls_R_factor_all          0.0841
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_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^)+(0.1131P)^2^+28.6903P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2009
_refine_ls_wR_factor_ref         0.2159
_reflns_Friedel_coverage         0.000
_reflns_number_gt                2766
_reflns_number_total             3681
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            c6ce00134c2.cif
_cod_data_source_block           6pp
_cod_depositor_comments
'Adding full bibliography for 7225407--7225427.cif.'
_cod_database_code               7225423
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_shelx_estimated_absorpt_t_min   0.669
_shelx_estimated_absorpt_t_max   0.749
_shelx_res_checksum              87618
_shelx_fab_checksum              17926