Figure 1
From: Generating and sustaining long-lived spin states in 15N,15N′-azobenzene
Structure of trans- and cis-15N, 15N′-azobenzene and trans- to cis-conversion reaction; we specify the numbering of an \({\rm{AA}}\text{'}{{\rm{X}}}_{2}{{\rm{X}}}_{2}^{\text{'}}\) spin system and relevant J-couplings exploited to enrich the singlet order of the 15N spin pair.
