10256-83-4Relevant articles and documents
Microporous thermosetting film constructed from hyperbranched polyarylate precursors containing rigid tetrahedral core: Synthesis, characterization, and properties
Zhang, Bufeng,Wang, Zhonggang
, p. 2780 - 2789 (2010)
Porous organic thermosetting film with pore size smaller than 20 A was constructed through the self-cross-linking reaction from hyperbranched polyarylate precursors with rigid tetrahedral skeleton. Using hydroquinone diacetate as the A2 monomer
Tetra-p-tolyl-Verbindungen p-Tol4Si und p-Tol4Ge: ein Beitrag zur Konfiguration der Tetraaryl-Methan-Analog Ar4M (M = C, Si, Ge, Sn, Pb)
Charisse, Michael,Roller, Stefan,Draeger, Martin
, p. 23 - 31 (1992)
p-Tol4Si and p-Tol4Ge have been obtained from the reaction of p-TolLi with SiCl4 and of p-TolMgBr with GeCl4, respectively.The crystal structures have been determined and compared with those of the homologous compounds p-Tol4Sn and p-Tol4Pb.The latter two
Central-atom size effects on the methyl torsions of group XIV tetratolyls
Ng, Maggie C. C.,Harper, Jason B.,Stampfl, Anton P. J.,Kearley, Gordon J.,Rols, Stephane,Stride, John A.
, p. 13018 - 13024 (2012)
The Group XIV tetratolyl series X(C6H4-CH 3)4 (X=C, Si, Ge, Sn, Pb) were studied by using inelastic neutron scattering to measure the low-energy phonon spectra to directly access the methyl-group torsional modes. The effect of increased molecular radius as a function of the size of the central atom was shown to have direct influence on the methyl dynamics, reinforced with the findings of molecular dynamics and contact surface calculations, based upon the solid-state structures. The torsional modes in the lightest analogue were found to be predominantly intramolecular: the Si and Ge analogues have a high degree of intermolecular methyl-methyl group interactions, whilst the heaviest analogues (Sn and Pb) showed pronounced intermolecular methyl interactions with the whole phonon bath of the lattice modes. Size matters! The size of the central atom in the Group XIV tetratolyls was shown to determine the solid-state structures courtesy of the effect that it has on the overall size of the molecules (see figure). Because the outer-most methyl groups enter into close intermolecular interactions (for the Si and Ge analogues), the structure is driven to lower symmetry; as a consequence, the smallest (C) and largest (Sn and Pb) analogues are isostructural. Copyright
METHOD OF PREPARING A METAL ORGANIC FRAMEWORK
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Page/Page column 18; 19, (2015/12/11)
The present invention relates to a method of preparing a metal organic framework comprising metal ions and carboxylate ligands; the method comprises: reacting (i) a source of metal ions, with (ii) a carboxylic acid precursor of a the carboxylate ligands,
Two-dimensional lattice of superboats composed of silicon-centered tetrahedra
Lambert, Joseph B.,Zhao, Yan,Stern, Charlotte L.
, p. 229 - 232 (2007/10/03)
Four benzenecarboxylic acid groups attached to silicon, (4-CO2HC6H4)4Si, form an infinite two-dimensional pleated sheet in the solid state composed of cyclic units of 78 heavy atoms in the shape of a large boat-