Self-assembly of a molecular crown as a structural analogue of calix[4]arene to modify Keggin anions.
Tian, Aixiang; Lin, Xiaoling; Ying, Jun; Zhang, Juwen; Lin, Hongyan; Liu, Guocheng; Zhao, Dan; Li, Na; Wang, Xiuli; Dalton transactions (Cambridge, England : 2003) 42 (2013) 9809–9812; doi:10.1039/c3dt50800e

data_7021511
_publ_section_title
;
 Self-assembly of a molecular crown as a structural analogue of
 calix[4]arene to modify Keggin anions.
;
_journal_issue                   27
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              9809
_journal_page_last               9812
_journal_paper_doi               10.1039/c3dt50800e
_journal_volume                  42
_journal_year                    2013
_chemical_formula_sum            'C28 H24 Ag8 N16 O42 P W12'
_chemical_formula_weight         4356.61
_chemical_name_systematic
;
?
;
_space_group_IT_number           129
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-P 4a 2a'
_symmetry_space_group_name_H-M   'P 4/n m m :2'
_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            2
_cell_length_a                   14.053(5)
_cell_length_b                   14.053(5)
_cell_length_c                   17.071(5)
_cell_measurement_reflns_used    5881
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      28.16
_cell_measurement_theta_min      1.88
_cell_volume                     3371(2)
_computing_data_collection       'Bruker XSCANS'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.988
_diffrn_measured_fraction_theta_max 0.988
_diffrn_measurement_device_type  'Bruker P4'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0588
_diffrn_reflns_av_unetI/netI     0.0378
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       22
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            20570
_diffrn_reflns_theta_full        28.16
_diffrn_reflns_theta_max         28.16
_diffrn_reflns_theta_min         1.88
_diffrn_standards_decay_%        none
_exptl_absorpt_coefficient_mu    22.761
_exptl_absorpt_correction_T_max  0.026
_exptl_absorpt_correction_T_min  0.010
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'ABSCOR by T.Higashi 8 March, 1995'
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    4.257
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             3798
_exptl_crystal_size_max          0.22
_exptl_crystal_size_mid          0.18
_exptl_crystal_size_min          0.16
_platon_squeeze_details
;
The free water molecules were highly disordered and could not be modeled properly, thus the SQUEEZE routine of PLATON was applied to remove the contributions to the scattering from the solvent molecules. The reported refinements are of the guest-free structures using the *.hkp files produced via the SQUEEZE routine.
;
_refine_diff_density_max         3.423
_refine_diff_density_min         -5.142
_refine_diff_density_rms         0.496
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.031
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     162
_refine_ls_number_reflns         2339
_refine_ls_number_restraints     88
_refine_ls_restrained_S_all      1.038
_refine_ls_R_factor_all          0.0650
_refine_ls_R_factor_gt           0.0564
_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^)+(0.0792P)^2^+224.0311P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1545
_refine_ls_wR_factor_ref         0.1608
_reflns_number_gt                1990
_reflns_number_total             2364
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c3dt50800e.txt
_cod_data_source_block           compound-1
_cod_original_sg_symbol_H-M      P4/nmm
_cod_database_code               7021511