Chemical polarisation of 15N and 13C nuclei in diazo coupling reactions

Abstract
Chemical polarisation of nitrogen and carbon nuclei in the decomposition and diazo coupling reactions of benzenediazonium fluoborate has been investigated. If homo‐ and heterolytic processes run in parallel in a multistage reaction sequence, then the nuclear polarisation created in a free‐radical reaction can be nearly quantitatively carried over to products of rapid ionic reactions such as azo dyes.