title: Protoisomerization of indigo di- and monoimines.
abstract: Indigo di- and monoimines can be protonated to form stable salts in which the central C=C bond has isomerized from a trans to cis configuration. Deprotonation of these salts regenerates the neutral trans species. The protonation chemistry of indigo is also explored.
authors.affiliation: Department of Chemistry, University of Victoria, PO Box 3065 STN CSC, Victoria BC V8W 3V6, Canada. rhicks@uvic.ca.
authors.forename: Emma C
authors.initials: EC
authors.lastname: Nicholls-Allison
authors.forename: Graeme
authors.initials: G
authors.lastname: Nawn
authors.forename: Brian O
authors.initials: BO
authors.lastname: Patrick
authors.forename: Robin G
authors.initials: RG
authors.lastname: Hicks
mesh_terms: D004396:Coloring Agents / Q000737:chemistry*; D007097:Imines / Q000737:chemistry*; D007203:Indigo Carmine / Q000737:chemistry*; D007536:Isomerism
chemical_list: D004396:Coloring Agents; D007097:Imines; D007203:Indigo Carmine