Further studies of fluoride ion entrapment in octasilsesquioxane cages; X-ray crystal structure studies and factors that affect their formation.
Taylor, Peter G.; Bassindale, Alan R.; El Aziz, Youssef; Pourny, Manuel; Stevenson, Richard; Hursthouse, Michael B.; Coles, Simon J.; Dalton transactions (Cambridge, England : 2003) 41 (2012) 2048–2059; doi:10.1039/c1dt11340b

data_7017700
_publ_section_title
;
 Further studies of fluoride ion entrapment in octasilsesquioxane cages;
 X-ray crystal structure studies and factors that affect their formation.
;
_journal_issue                   7
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              2048
_journal_page_last               2059
_journal_paper_doi               10.1039/c1dt11340b
_journal_volume                  41
_journal_year                    2012
_chemical_formula_moiety         'C40 H68 F25 N O12 Si8'
_chemical_formula_sum            'C40 H68 F25 N O12 Si8'
_chemical_formula_weight         1454.67
_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                93.1750(10)
_cell_angle_beta                 108.8610(10)
_cell_angle_gamma                114.5910(10)
_cell_formula_units_Z            2
_cell_length_a                   14.5495(4)
_cell_length_b                   15.8583(4)
_cell_length_c                   16.7260(4)
_cell_measurement_reflns_used    14446
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      27.485
_cell_measurement_theta_min      2.910
_cell_volume                     3238.86(15)
_computing_cell_refinement
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_data_collection       'COLLECT (Hooft, R.W.W., 1998)'
_computing_data_reduction
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      120(2)
_diffrn_detector_area_resol_mean 9.091
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device_type
'Bruker-Nonius Roper CCD camera on \k-goniostat'
_diffrn_measurement_method       '\f & \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0889
_diffrn_reflns_av_sigmaI/netI    0.0969
_diffrn_reflns_limit_h_max       18
_diffrn_reflns_limit_h_min       -18
_diffrn_reflns_limit_k_max       20
_diffrn_reflns_limit_k_min       -20
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            64160
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         2.96
_exptl_absorpt_coefficient_mu    0.289
_exptl_absorpt_correction_T_max  0.9885
_exptl_absorpt_correction_T_min  0.9607
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS 2007/2 (Sheldrick, G.M., 2007)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.492
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       fragment
_exptl_crystal_F_000             1496
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.06
_exptl_crystal_size_min          0.04
_refine_diff_density_max         1.096
_refine_diff_density_min         -1.322
_refine_diff_density_rms         0.109
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.028
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     782
_refine_ls_number_reflns         14825
_refine_ls_number_restraints     66
_refine_ls_restrained_S_all      1.039
_refine_ls_R_factor_all          0.1203
_refine_ls_R_factor_gt           0.0717
_refine_ls_shift/su_max          0.002
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0801P)^2^+5.9859P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1681
_refine_ls_wR_factor_ref         0.1942
_reflns_number_gt                9607
_reflns_number_total             14825
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1dt11340b.txt
_cod_data_source_block           compound17
_cod_original_cell_volume        3238.86(14)
_cod_original_sg_symbol_H-M      P-1
_cod_database_code               7017700