Self-Assembly by Ligand-Exchange Reactions

✍ Scribed by Dillip Kumar Chand; Ramalingam Manivannan; Himansu S. Sahoo; Kandasamy Jeyakumar

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 181 KB
• Volume: 2005
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200500192

✦ Synopsis

Abstract

An interesting phenomenon of ligand exchange is observed in the DMSO solution of certain self‐assembled molecules generated from cis‐protected Pd^II^ and organic ligands. Upon heating, assemblies such as {Pd(en)}~x~(ligand)~y~~2__x__~ change to Pd__~m~(ligand)~n~__~2__m__~ and Pd(en)~2~~2~. The change is also possible at room temperature when 0.5 equiv. Pd(en)(NO~3~)~2~ is added in excess to the system. The transformation is incomplete when the ligand moiety is monodentate in nature, for example in the case of 4‐phenylpyridine. However, multinuclear assemblies containing nonchelating, polydentate ligands used in this study entirely favor the transformation. This process is not possible with some related Pt^II^ compounds. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)