lcpq-codes/content/eplf/_index.md

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---
title: "EPLF"
date: 2020-07-09T17:50:53+02:00
draft: false
---
Web page : https://sourceforge.net/projects/eplf/
The Electron Pair Localization Function is a function defined in the three-dimensional space. It measures the degree of pairing of electrons in a molecule, with an increasing value as the electron pairing increases. Therefore chemical bonds, core domains and lone pairs can be visualized.
![Example](./c2h_eplf.jpg)
## Download
The following packages are needed:
- [IRPF90](https://www.lcpq.ups-tlse.fr/codes/irpf90/)
- [EZFIO](https://www.lcpq.ups-tlse.fr/codes/ezfio/)
The latest version can be downloaded [here](http://sourceforge.net/projects/eplf/files/latest).
## People involved
- Michel Caffarel
- Yann Garniron
- Anthony Scemama
## Related Papers
[Electron pair localization function, a practical tool to visualize electron localization in molecules from quantum Monte Carlo data](http://dx.doi.org/10.1063/1.1765098)
A. Scemama, P. Chaquin, M. Caffarel, J. Chem. Phys., vol 121, pp. 1725-1735 (2004).
[Electron Pair Localization Function (EPLF) for Density Functional Theory and ab initio wave function-based methods : a new tool for chemical interpretation](http://pubs.acs.org/doi/abs/10.1021/ct1005938)
A. Scemama, M. Caffarel, R. Chaudret, J.-P. Piquemal, J. Chem. Theory Comput. vol. 7 (3), pp. 618624 (2011).