The Generality of Architectural Isomerism in Designer Inclusion Frameworks
K. Travis Holman; Stephen M. Martin; Daniel P. Parker; Michael D. Ward; Journal of the American Chemical Society 123 (2001) 4421–4431; doi:10.1021/ja0030257

data_4115516
_publ_section_title
;
 The Generality of Architectural Isomerism in Designer Inclusion
 Frameworks
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              4421
_journal_page_last               4431
_journal_paper_doi               10.1021/ja0030257
_journal_volume                  123
_journal_year                    2001
_chemical_formula_sum            'C16 H42 N6 O6 S2'
_chemical_formula_weight         478.68
_chemical_name_common
'bis(guanidinium) 1,8-octanedisulfonate, hexane clathrate '
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           62
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ac 2n'
_symmetry_space_group_name_H-M   'P n m a'
_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            4
_cell_length_a                   14.4260(11)
_cell_length_b                   7.4303(6)
_cell_length_c                   22.4383(17)
_cell_measurement_reflns_used    2216
_cell_measurement_temperature    173(2)
_cell_volume                     2405.2(3)
_computing_cell_refinement       'SAINT, Bruker'
_computing_data_collection       'SMART, Bruker (or Siemens)'
_computing_data_reduction        'SAINT, Bruker'
_computing_molecular_graphics
'XSEED, L. Barbour (1999); http://www.lbarbour.com/xseed'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      173(2)
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'SMART platform CCD, Bruker (or Siemens)'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1093
_diffrn_reflns_av_sigmaI/netI    0.0505
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -17
_diffrn_reflns_limit_k_max       8
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       26
_diffrn_reflns_limit_l_min       -26
_diffrn_reflns_number            17601
_diffrn_reflns_theta_full        25.00
_diffrn_reflns_theta_max         25.00
_diffrn_reflns_theta_min         1.68
_exptl_absorpt_coefficient_mu    0.264
_exptl_absorpt_correction_T_max  0.9895
_exptl_absorpt_correction_T_min  0.8663
_exptl_absorpt_correction_type   'simulated psi-scans '
_exptl_absorpt_process_details   'SADABS, G. Sheldrick (1999)'
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    1.322
_exptl_crystal_description       plate
_exptl_crystal_F_000             1040
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.21
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.392
_refine_diff_density_min         -0.487
_refine_diff_density_rms         0.074
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.075
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     212
_refine_ls_number_reflns         2296
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.075
_refine_ls_R_factor_all          0.0967
_refine_ls_R_factor_gt           0.0666
_refine_ls_shift/su_max          0.106
_refine_ls_shift/su_mean         0.007
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1601P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2163
_refine_ls_wR_factor_ref         0.2372
_reflns_number_gt                1544
_reflns_number_total             2296
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja0030257_18.cif
_cod_data_source_block           d:\steve\00284\pnma284
_cod_database_code               4115516