Indirect detection of spin-1 nuclei. Application and product-operator description of “inverse”-correlation experiments with InSm spin systems

Examples for the indirect detection of spin S = 1 nuclei by a twofold coherence transfer I → S → I are shown. The product-operator formalism for spin-l nuclei is summarized and employed for the rationalization of the experiments. Systematic approaches to the design of the experiments are discussed. It is demonstrated how (¹H = I, ²H = S) correlation techniques can be used for the assignment of the ²H resonances of partially deuterated transition-metal polyhydrido-complexes. Expectations based on our theoretical description of coherence-transfer mechanisms are shown to agree with experimental results of (¹³C, ²H) and (¹H, ¹⁴N) correlation experiments, using deuterated solvents and ammonium chloride as samples.