Journal
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
Volume 25, Issue 1, Pages 55-60Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jmgm.2005.11.002
Keywords
ab initio fitted potential; simulation; solvation; coordination number; 18-crown-6/K+
Ask authors/readers for more resources
The intermolecular potential between a 18-crown-6/K+ complex and a water molecule is derived from 1200 energy points obtained from quantum chemical calculations using the 6-31G** basis set. The ab initio fitted potential was then applied to study the structural properties of the complex in an aqueous solution using the Monte Carlo simulation method. The radial distribution function (RDF) centered at K+ to the oxygen atom of water shows a sharp first peak at 2.88 angstrom. The corresponding coordination number, integrated up to the first minimum at 3.76 angstrom., is 2 water molecules. The results indicate clearly that the 18-crown-6/K+ complex was solvated by the two nearest neighbors, one above and other below the ligand's plane. Evaluation was focused on the precise position and orientation of the two water molecules. It was found that the oxygen atoms of the two nearest neighbors bind to the K+ while their hydrogen atoms rotate freely around the vector perpendicular to the ligand's molecular plane. (c) 2005 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available