Highly Porous and Robust Scandium-based Metal-Organic Frameworks for Hydrogen Storage
Ilich A. Ibarra; Sihai Yang; Xiang Lin; Alexander J. Blake; Pierre J. Rizkallah; Harriott Nowell; David R. Allan; Neil R. Champness; Peter Hubberstey; Martin Schroder; Chem.Commun. 47 (2011) 8304–; doi:10.1039/c1cc11168j

data_7106667
_publ_section_title
;
 Highly Porous and Robust Scandium-based Metal-Organic Frameworks for
 Hydrogen Storage
;
_journal_name_full               Chem.Commun.
_journal_page_first              8304
_journal_paper_doi               10.1039/c1cc11168j
_journal_volume                  47
_journal_year                    2011
_chemical_formula_moiety         'C24 H12 O15 Sc3, C3 H7 N O, 6(H2 O)'
_chemical_formula_structural     '[Sc3 (C16H6O8)1.5 (OH)3], (C3H7NO), (H2O)6'
_chemical_formula_sum            'C27 H31 N O22 Sc3'
_chemical_formula_weight         856.41
_chemical_name_systematic
;
?
;
_space_group_IT_number           24
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'I 2b 2c'
_symmetry_space_group_name_H-M   'I 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           'enCIFer editing of SHELXL97 CIF output'
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            1
_cell_length_a                   15.352(2)
_cell_length_b                   12.3850(10)
_cell_length_c                   46.027(8)
_cell_measurement_reflns_used    5064
_cell_measurement_temperature    120(2)
_cell_measurement_theta_max      23.18
_cell_measurement_theta_min      2.78
_cell_volume                     8751(2)
_computing_cell_refinement       'Bruker SAINT'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker SAINT'
_computing_publication_material
'enCIFer (Allen et al., 2004): PLATON (Spek, 2009)'
_computing_structure_refinement  'SHELXL97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      120(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  'Bruker SMART APEXII CCD diffractometer'
_diffrn_measurement_method       'fine-slice \w scans'
_diffrn_radiation_monochromator  'silicon 111'
_diffrn_radiation_source         'Daresbury SRS Station 9.8'
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.6893
_diffrn_reflns_av_R_equivalents  0.083
_diffrn_reflns_av_sigmaI/netI    0.077
_diffrn_reflns_limit_h_max       19
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       0
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       57
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            47148
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         26.00
_diffrn_reflns_theta_min         1.37
_diffrn_standards_decay_%        2
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.508
_exptl_absorpt_correction_T_max  1.000
_exptl_absorpt_correction_T_min  0.714
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'Bruker SADABS'
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.108
_exptl_crystal_description       Needle
_exptl_crystal_F_000             2956
_exptl_crystal_size_max          0.15
_exptl_crystal_size_mid          0.05
_exptl_crystal_size_min          0.05
_platon_squeeze_details
;
Appromimately 45% of the unit cell volume comprises a large region of
disordered solvent which could not be modelled as discrete atomic sites.
We used PLATON SQUEEZE to calculate the contribution to the diffraction
from the solvent region and thereby produced at set of solvent-free diffraction
intensities. SQUEEZE estimated a total count of 638 electrons per unit cell,
which were assigned to be 21 water molecules and 3.5 DMF molecules per unit
cell. The final formula was calculated considering elemental analysis results.
;
_refine_diff_density_max         0.86
_refine_diff_density_min         -0.32
_refine_diff_density_rms         0.08
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.47(4)
_refine_ls_extinction_coef       0.00026(8)
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   0.69
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     415
_refine_ls_number_reflns         5045
_refine_ls_number_restraints     188
_refine_ls_restrained_S_all      0.67
_refine_ls_R_factor_all          0.103
_refine_ls_R_factor_gt           0.0392
_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^)+(0.086P)^2^] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.117
_refine_ls_wR_factor_ref         0.130
_reflns_number_gt                1570
_reflns_number_total             5045
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c1cc11168j.txt
_cod_data_source_block           1
_cod_original_formula_sum        'C27 H31 N1 O22 Sc3'
_cod_database_code               7106667