intermolecular potential / nitro group



 Dear CCLers,
 Does anybody know if empirical potentials are available for nitro groups
 ? We are in fact looking for non-bonded (intermolecular) terms. So far
 we are using AMBER95 but there is no atoms types for N and O in nitros,
 to our knowledge.
 Thanks.
 Regards.
 --
 Didier MATHIEU
 CEA - Le Ripault, BP 16
 37260 Monts (France)
 Tel. 33(0)2.47.34.41.85