Aqueous Ethylenediamine Dihydroxo Palladium(II): A Coordinating Agent for Low- and High-Molecular Weight Carbohydrates

Abstract

The metal-binding sites of sucrose have been revealed for the first time by reaction with an aqueous solution of [Pd(en)(OH)2] (Pd-en). The structure of the resulting complex is depicted on the right. Pd-en is also a coordinating solvent for cellulose and gives rise to molecularly dispersed polysaccharide chains that act as poly-diolato ligands. The metallated cellulose chain is stiffened by strong intramolecular, interresidue hydrogen bonding.