epsilon and sigma for ion cu+1 and cu +2

hi dears,
who knows the value of epsilon and sigma for ino copper cu+1 and cu+2 ?
the values for nutral copper atoms are : epsilon: 9.44 kcal/mol , and sigma : 2.338 angstrom
and in site: (( http://www.lenntech.com/periodic/elements/cu.htm )) tells that the diameter of ino cu+1 is 1.755 angstrome,
can we use this value as sigma for cu+1 ?
what is the value of epsilon for cu+1 ?
tnx.

hi dears,
who knows the value of epsilon and sigma for ino copper cu+1 and cu+2 ?
the values for nutral copper atoms are : epsilon: 9.44 kcal/mol , and
sigma : 2.338 angstrom
and in site: (( Copper (Cu) - Chemical properties, Health and Environmental effects )) tells
that the diameter of ino cu+1 is 1.755 angstrome,
can we use this value as sigma for cu+1 ?
what is the value of epsilon for cu+1 ?

this is not how this works. there are no "absolute" values for either
of these, but they depend on the parameterization strategy for all
other molecules in your system. each force field has a different
strategy and even then, those usually only work well for simple small
organic molecules. for almost everything else, you need to
re-parameterize according to the state and system that you want to
model.

axel.