  We calculate the static and dynamic properties of single crystal, single
molecule magnets consisting of equal spin $S=1/2$ or 5/2 dimers. The spins in
each dimer interact with each other via the Heisenberg exchange interaction and
with the magnetic induction ${\bf B}$ via the Zeeman interaction, and
interdimer interactions are negligible. For antiferromagnetic couplings, the
static magnetization and specific heat exhibit interesting low temperature $T$
and strong ${\bf B}$ quantum effects. We calculate the frequency spectrum of
the Fourier transform of the real part of the time autocorrelation function
${\cal C}_{11}(t)$ for arbitrary $T, {\bf B}$, and compare our results with
those obtained for classical spins. We also calculate the inelastic neutron
magnetic dynamical structure factor $S({\bf q},\omega)$ at arbitrary $T, {\bf
B}$.
