  The previous paper [Veldhorst et al., J. Chem. Phys. 141, 054904 (2014)]
demonstrated that the isomorph theory explains the scaling properties of a
liquid of flexible chains consisting of ten Lennard-Jones particles connected
by rigid bonds. We here investigate the same model with harmonic bonds. The
introduction of harmonic bonds almost completely destroys the correlations in
the equilibrium fluctuations of the potential energy and the virial. According
to the isomorph theory, if these correlations are strong a system has
isomorphs, curves in the phase diagram along which structure, dynamics and the
excess entropy are invariant. The Lennard-Jones chain liquid with harmonic
bonds does have curves in the phase diagram along which the structure and
dynamics are invariant. The excess entropy is not invariant on these curves,
which we refer to as "pseudoisomorphs". In particular this means that
Rosenfeld's excess-entropy scaling (the dynamics being a function of excess
entropy only) does not apply for the Lennard-Jones chain with harmonic bonds.
