Structural Diversity in Metal−Organic Frameworks Built from Rigid Tetrahedral [Si(p-C6H4CO2)4]4−Struts
Davies, Robert P.; Less, Rob; Lickiss, Paul D.; Robertson, Karen; White, Andrew J. P.; Crystal Growth & Design 10 (2010) 4571–; doi:10.1021/cg1008768

data_4502026
_publ_section_title
;
 Structural Diversity in Metal&#x2212;Organic Frameworks Built from Rigid
 Tetrahedral [Si(p-C6H4CO2)4]4&#x2212;Struts
;
_journal_issue                   10
_journal_name_full               'Crystal Growth &amp; Design'
_journal_page_first              4571
_journal_paper_doi               10.1021/cg1008768
_journal_volume                  10
_journal_year                    2010
_chemical_formula_moiety
'C28 H16 O8 Si Zn1.50, C2 H8 N, 1.5(C3 H7 N O)'
_chemical_formula_sum            'C34.5 H34.5 N2.5 O9.5 Si Zn1.5'
_chemical_formula_weight         762.29
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           48
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  '-P 2ab 2bc'
_symmetry_space_group_name_H-M   'P n n 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            8
_cell_length_a                   14.1529(4)
_cell_length_b                   23.4060(6)
_cell_length_c                   23.8325(6)
_cell_measurement_reflns_used    6626
_cell_measurement_temperature    173(2)
_cell_measurement_theta_max      32.6824
_cell_measurement_theta_min      4.0887
_cell_volume                     7894.8(4)
_computing_cell_refinement       'CrysAlis RED, Oxford Diffraction Ltd'
_computing_data_collection       'CrysAlis CCD, Oxford Diffraction Ltd'
_computing_data_reduction        'CrysAlis RED, Oxford Diffraction Ltd'
_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      173(2)
_diffrn_detector_area_resol_mean 15.9863
_diffrn_measured_fraction_theta_full 0.987
_diffrn_measured_fraction_theta_max 0.953
_diffrn_measurement_device_type  'OD Xcalibur 3'
_diffrn_measurement_method       'omega scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'Enhance (Mo) X-ray Source'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.1371
_diffrn_reflns_av_sigmaI/netI    0.3538
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -19
_diffrn_reflns_limit_k_max       33
_diffrn_reflns_limit_k_min       -35
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -35
_diffrn_reflns_number            76764
_diffrn_reflns_theta_full        32.00
_diffrn_reflns_theta_max         32.74
_diffrn_reflns_theta_min         4.10
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    1.001
_exptl_absorpt_correction_T_max  0.978
_exptl_absorpt_correction_T_min  0.875
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
; 
CrysAlisPro, Oxford Diffraction Ltd., 
Version 1.171.33.41 (release 06-05-2009 CrysAlis171 .NET) 
(compiled May  6 2009,17:20:42) 
Analytical numeric absorption correction using a multifaceted crystal 
model based on expressions derived by R.C. Clark & J.S. Reid. 
(Clark, R. C. & Reid, J. S. (1995). Acta Cryst. A51, 887-897) 
;
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.283
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plates
_exptl_crystal_F_000             3152
_exptl_crystal_size_max          0.21
_exptl_crystal_size_mid          0.14
_exptl_crystal_size_min          0.02
_platon_squeeze_details
;
 SQUEEZE suggests 746 e/cell = 93.3 e/asu.
 The cation Me2NH2 = C2H8N = 27e. The solvent used was dmf = C3H7NO = 40e
 93.3 - 27 = 66.3. 1.5dmf = 60e, so solvent modelled as 1.5dmf.
;
_refine_diff_density_max         0.395
_refine_diff_density_min         -0.366
_refine_diff_density_rms         0.083
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.674
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     362
_refine_ls_number_reflns         13908
_refine_ls_number_restraints     80
_refine_ls_restrained_S_all      0.675
_refine_ls_R_factor_all          0.2155
_refine_ls_R_factor_gt           0.0555
_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^)+(0.0715P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1445
_refine_ls_wR_factor_ref         0.1621
_reflns_number_gt                3485
_reflns_number_total             13908
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            cg1008768_si_001.cif
_cod_data_source_block           IMP-12
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' according to
/home/saulius/struct/CIF-dictionaries/cif_core.dic dictionary named
'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_sg_symbol_H-M      Pnnn
_cod_original_formula_sum        'C34.50 H34.50 N2.50 O9.50 Si Zn1.50'
_cod_database_code               4502026