ChemInform Abstract: Copper(II) Complexes of Diastereoisomeric Methionylmethionines in Aqueous Solution. Favoring of the Amide-Deprotonated Complex in the L,L-Dipeptide Without Sulfur Coordination

A thermodynamic investigation on Cu(II) complexes of L-methionyl-L-methionine or D-methionyl-L-methionine at 25 °C shows a thermodynamic stereoselectivity in the formation of the amide-deprotonated complexes, in particular for that of the L,L-dipeptide.