A coordination network based on d0 transition-metal centers: synthesis and structure of the [2,4]-connected layered compound [(TiCl4)2Si(C6H4CN-p)4]·1.5C7H8
作者:Feng-Quan Liu、Feng-Quan Liu、T. Don Tilley
DOI:10.1039/a706020c
日期:——
The tetrafunctional silane Si(C6H4CN-p)4 forms a coordination network with TiCl4 consisting of 4,2-connected layers containing large (56 atom) rings.
Organosilicon linkers in metal organic frameworks: the tetrahedral tetrakis(4-tetrazolylphenyl)silane ligand
作者:Ivan Timokhin、Júlia Baguña Torres、Andrew J. P. White、Paul D. Lickiss、Claudio Pettinari、Robert P. Davies
DOI:10.1039/c3dt51863a
日期:——
Formal substitution of the central carbon by silicon within the tetrahedral tetrakis(4-tetrazolylphenyl)methane linker in a copper-based MOF is shown to uniquely influence the structure of the resultant MOF, affecting the orientation of the metal-based nodes and leading to an increase in unit-cell volume and solvent accessible void space.
Coordination Networks Based on Tetrahedral Silane Building Blocks: Influence of the Anion on Structures Adopted by Ag<sup>+</sup>−Si(<i>p</i>-C<sub>6</sub>H<sub>4</sub>CN)<sub>4</sub> Arrays
作者:Feng-Quan Liu、T. Don Tilley
DOI:10.1021/ic9703484
日期:1997.10.1
The silane tetrakis(4-cyanophenyl)silane (1) was prepared by the reaction of 4-lithiobenzonitrile with silicon tetrachloride at -100 degrees C. This tetrahedral molecular building block crystallizes with AgOTf (OTf = O3SCF3) from benzene and dichloromethane to give [Ag2Si(p-C6H4CN)(4)][OTf](2) .2C6H6 (2). The extended solid structure of 2 is composed of interpenetrating ''double layers'' which are 3-connected via trigonal planar Ag and tetrahedral Si centers. The individual nets contain six-membered rings which are folded in one corner along a Si ... Si vector to give an envelope conformation. Overall, the structure is heavily cross-linked via -CN-Ag(1)-NC-, -Ag(1)-Ag(2)-NC-, and -CN-Ag(2)(mu-O3SCF3)(2)Ag(2)-NC-linkages. Compound 1 also crystallizes with AgPF6, to give Ag-3[Si(p-C6H4CN)(4)](2)}[PF6](3) . 1.6THF . 0.5C(6)H(6) . CH2Cl2 (3). This coordination network also contains 3-connected nets, with six-membered rings in the chair conformation. These nets are interwoven to form the 3-dimensional structure. Compounds 2 and 3 are air-sensitive, and their structures are readily broken up by dissolution in acetone. The network of 2 appears to lose crystallinity when exposed to heat and vacuum (by PXRD) but nonetheless retains some properties as a molecular sieve.