Formation of tetrameric water clusters driven by a cavitand template.
Massera, Chiara; Melegari, Monica; Ugozzoli, Franco; Dalcanale, Enrico; Chemical communications (Cambridge, England) 46 (2009) 88–90; doi:10.1039/b917931c

data_7105128
_publ_section_title
;
 Formation of tetrameric water clusters driven by a cavitand template.
;
_journal_issue                   1
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              88
_journal_page_last               90
_journal_paper_doi               10.1039/b917931c
_journal_volume                  46
_journal_year                    2009
_chemical_formula_sum            'C37 H48 O17 P4'
_chemical_formula_weight         888.63
_chemical_name_systematic
;
?
;
_space_group_IT_number           85
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-P 4a'
_symmetry_space_group_name_H-M   'P 4/n :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                   14.352(2)
_cell_length_b                   14.352(2)
_cell_length_c                   9.8218(17)
_cell_measurement_reflns_used    2045
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      29.03
_cell_measurement_theta_min      2.01
_cell_volume                     2023.2(6)
_computing_data_collection       SMART
_computing_data_reduction        'SAINT (Bruker, 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SIR97 (Giacovazzo et al., 1999)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean '8.192 pixels/mm'
_diffrn_measured_fraction_theta_full 0.967
_diffrn_measured_fraction_theta_max 0.967
_diffrn_measurement_device_type  'BRUKER AXS SMART 1000'
_diffrn_measurement_method       omega-scan
_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  0.0260
_diffrn_reflns_av_sigmaI/netI    0.0236
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -17
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -8
_diffrn_reflns_number            12598
_diffrn_reflns_theta_full        29.03
_diffrn_reflns_theta_max         29.03
_diffrn_reflns_theta_min         2.01
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.262
_exptl_absorpt_correction_T_max  1.000000
_exptl_absorpt_correction_T_min  0.782580
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker AXS SADABS'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.459
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             932
_exptl_crystal_size_max          0.11
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.08
_refine_diff_density_max         0.549
_refine_diff_density_min         -0.228
_refine_diff_density_rms         0.063
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.008
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     144
_refine_ls_number_reflns         2626
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.008
_refine_ls_R_factor_all          0.0657
_refine_ls_R_factor_gt           0.0467
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1008P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1417
_refine_ls_wR_factor_ref         0.1509
_reflns_number_gt                1836
_reflns_number_total             2626
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b917931c.txt
_cod_data_source_block           tpometaq
_cod_original_sg_symbol_H-M      P4/n
_cod_database_code               7105128