; Perchlorate anion [ClO4]
;
; Ionic liquid OPLS-AA force field
; Version 3/2017
; Orlando Acevedo
; Email: orlando.acevedo@miami.edu
; Contributors: S.V. Sambasivarao, B. Doherty, X. Zhong, S. Gathiaka, B. Li
;
; S.V. Sambasivarao, O. Acevedo, Development of OPLS-AA Force Field Parameters for 68 Unique Ionic Liquids,
;     J. Chem. Theory Comput., 2009, 5, 1038-1050.
;
; B. Doherty, X. Zhong, S. Gathiaka, B. Li, O. Acevedo, Revisiting OPLS Force Field Parameters for Ionic Liquid Simulations,
;     J. Chem. Theory Comput., 2017, 13, 6131-6145.
;
; Values given below for use in GROMACS 5.0.7 and in comments are traditional OPLS-AA units (e.g., angstroms, kcal/mol, degrees)

[  atomtypes  ]
;   type    mass     charge  ptype sigma(nm) epsilon(kJ/mol) sigma(Ang.) epsilon(kcal/mol)
Clc    35.45     0.940   A    0.35    0.49283    ;    3.5    0.118
Oc     15.99    -0.435   A    0.29    0.87864    ;    2.9    0.21