Prototropy tautomerism and E/Z-stereoisomerism of 2-iminothiazolidin-4-ones was extensively studied in the literature during the past several decades. This tautomerism was studied for both alkyl/aryl–amino/imino-substituted thiazolidinones/ thiazolinones by several authors (Comrie, 1964; Åkerblom, 1967; Chowdry et al., 2000; Mornon & Raveau, 1971; Ramsh et al., 1978) in the solid state, as well...

The influence of anions on tautomerism in benzimidazole containing anion receptors has been studied via a variety of techniques in both solution and the solid state. The results show that hydrogen bonding interactions between the receptors and guests have a significant effect of the nature of the tautomer present. The compounds show a preference for complexation of lactate over pyruvate.

A variety of internally N-alkylated N-confused porphyrins were prepared in a stepwise manner through the protection of the reactive peripheral nitrogen atom. NH-Tautomerism in N-confused porphyrins was found to be regulated by N-alkylation, which enabled us to obtain discrete information on two important NH-tautomers of an N-confused porphyrin.

UV light and surface defects accelerate the degradation process of perovskite solar cells (PSCs). In their Communication on page 8673, Mingzhu Li, Yanlin Song, co-workers utilize tautomerism “sunscreen” molecules under illumination to protect PSC from enable molecular defect passivation, achieving high efficiency long-term stability PSCs.