Chemistry Journal of Moldova

THE STRUCTURE OF THE TETRA-POTASSIUM SALT OF CALIX[4]ARENE DIHYDROXYPHOSPHONIC ACID

Author(s):

Adina N. Lazar, Oksana Danylyuk, Kinga Suwinska and Anthony W. Coleman


Field: Inorganic and coordination chemistry
Type: Research paper
Issue: 2007 Volume 2, no.1
Pages: 98-101
Keywords:

Calixarenes, cation binding, electrostatic interactions.


Full Text (PDF): Download
Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2007.02(1).07

Graphical Abstract: 
The solid-state structure of the tri-potassium calix[4]arene dihydroxyphosphonate salt is presented. In this structure, two potassium cations bridge between layers of dimeric calixarene diphosphonate units and two other potassium cations bridge along the face of the layers. The ubiquitous dimeric association of the calixarenes shows the highest interdigitation value so far observed. As expected, the cations are solvated and are complexed exo with respect to calixarene crown. The octahedral coordination sphere of the potassium cations is formed by two phosphonate groups of the calixarenes and four water molecules. Electrostatic forces represent the major element of interaction in the solid-state system.

Downloads: 10