def opls_264(atom): """Cl chlorobenzene """ return benzene(atom.bond_partners[0])
def opls_145(atom): """Benzene C - 12 site JACS,112,4768-90. Use #145B for biphenyl """ return benzene(atom)
def opls_264(atom): """Cl chlorobenzene """ return benzene(atom.neighbors[0])