The Central Atom Size Effect on the Structure of Group 14 Tetratolyls
作者:Maggie C. C. Ng、Donald J. Craig、Jason B. Harper、Lambert van-Eijck、John A. Stride
DOI:10.1002/chem.200900360
日期:2009.7.6
Size matters! The structure and dynamics of the tetratolylGroup14 elements, which were probed by using high‐resolution inelastic neutron scattering spectra, show a remarkable dependence on the size of the centralatom. The para‐methyl groups at the periphery of the molecules constitute the frontier intermolecular interactions of increasingly larger tetrahedra, which becomes critical at the molecular
[EN] METHOD OF PREPARING A METAL ORGANIC FRAMEWORK<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UNE STRUCTURE MÉTALLO-ORGANIQUE
申请人:TEXAS A & M UNIV SYS
公开号:WO2015177511A1
公开(公告)日:2015-11-26
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, in an organic solvent consisting of one or more carboxylic acid solvents, at a temperature of about 75°C or greater, optionally in the presence of water. The present invention also relates to the same method for preparing monocrystalline metal organic frameworks as well as the metal organic frameworks obtained from such methods.
Tetra-p-tolyl-verbindungen p-Tol4Si und p-Tol4Ge: Ein beitrag zur konfiguration der tetraaryl-methan-analoga Ar4M (M = C, Si, Ge, Sn, Pb)
作者:Michael Charissé、Stefan Roller、Martin Dräger
DOI:10.1016/0022-328x(92)83201-r
日期:1992.4
undistorted tetrahedron. In the cases of the silane and germane (space group Pc), the tetrahedron is lengthened along one of the bond axes CM: only three of the four p-Tol groups are closer together, and the set up of a special molecular symmetry is blocked. All this is caused by the different atomic radii of the central atoms. 13C NMR data in CDCl3 solution are given.
Towards hydrogen and halogen bonded frameworks based on 3,5-bis(triazolyl)pyridinium motifs
作者:Émer M. Foyle、Hui Min Tay、Nicholas G. White
DOI:10.1039/d2ce00273f
日期:——
developed the use of Zincke methodology to prepare rigid ditopic and tetratopic hydrogen and halogen bonding tectons, and were able to crystallise the sulfate derivative of a tetratopic receptor, although unfortunately this did not have the desired open framework. Several crystal structures were obtained with the receptors and monovalent anions, including one containing an unusually short iodotriazole⋯Cl−
我们尝试使用氢、碘和硒基 3,5-双(三唑基)吡啶 ( btp ) 基序来形成由氢、卤素或硫属元素与阴离子键合组装的 3D 超分子框架。最初,我们制备了灵活的二位和四位受体,其中吡啶鎓氮原子被苄基官能化,但无法结晶扩展框架。我们随后开发了使用 Zincke 方法来制备刚性双位和四位氢和卤素键合结构,并且能够结晶四位受体的硫酸盐衍生物,尽管不幸的是这没有所需的开放框架。用受体和单价阴离子获得了几种晶体结构,包括一种含有异常短的碘三唑⋯Cl -卤键。通常,btp三唑基团显示出旋转偏离所需构象的趋势,并且似乎这可能导致即使当受体具有刚性核心时也难以获得 3D 框架。