title: Static and dynamic stereochemistry of chiral Ln DOTA analogues.
abstract: Ln DOTA derivatives (DOTA=1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) are known to undergo relevant stereoisomeric equilibria in solution, which greatly modulate their chemical as well as their magnetic and optical properties. The subject is reviewed in terms of classical stereochemical description, with reference to conformational enthalpies. Yb is taken as the reference element because of its unique spectroscopic properties, namely, a small contact contribution to the paramagnetic shift and an intense near-infrared electronic circular dichroism, endowed with an easily recognizable fine structure.
authors.affiliation: Dipartimento di Chimica e Chimica Industriale, Università di Pisa, via Risorgimento 35, I-56126 Pisa, Italy. ldb@dcci.unipi.it
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Di Bari
authors.forename: Piero
authors.initials: P
authors.lastname: Salvadori