  The NMR spectroscopy of spin-1/2 nuclei with low gyromagnetic ratio is
challenging, due to the low NMR signal strength. Methodology for the rapid
acquisition of $^{103}$Rh NMR parameters is demonstrated for the case of the
rhodium formate "paddlewheel" complex $\mathrm{Rh_2(HCO_2)_4}$. A scheme is
described for enhancing the $^{103}$Rh signal strength by polarization transfer
from $^{1}$H nuclei and which also greatly reduces the interference from
ringing artifacts, a common hurdle for the direct observation of low-$\gamma$
nuclei. The $^{103}$Rh relaxation time constants $T_1$ and $T_2$ are measured
within 20 minutes using $^{1}$H-detected experiments. The field-dependence of
the $^{103}$Rh $T_1$ is measured. The high-field relaxation is dominated by the
chemical shift anisotropy (CSA) mechanism. The $^{103}$Rh shielding anisotropy
is found to be very large: $|\Delta\sigma|=9900\pm540\mathrm{\,ppm}$. This
estimate is compared with density functional theory calculations.
