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Recently developed polarisation transfer techniques are applied to the 103Rh nuclear magnetic resonance (NMR) of the 103Rh(acac)3 coordination complex in solution. Four-bond 1H - 103Rh J couplings of around 0.39 Hz are exploited to enhance the 103Rh NMR signal and to estimate the 103Rh T1 and T2 relaxation times as a function of field and temperature. The 103Rh longitudinal T1 relaxation in 103Rh(acac)3 is shown to be dominated by the spin-rotation mechanism, with an additional field-dependent contribution from the 103Rh chemical shift anisotropy.
Harbor-Collins et al. (2024) studied this question.