Metal Complexes: Environmental and Biomedical Applications

Synthesis of Metal Complexes from N-Heterocyclic Carbene and Schiff Base Ligands

Author(s): Rojalin Sahu* and Puspanjali Sahu * .

Pp: 17-29 (13)

DOI: 10.2174/9789815238723124010003

* (Excluding Mailing and Handling)

Abstract

The synthesis of transition metal complexes from N-heterocyclic carbene and Schiff base ligands is discussed in this chapter. A few basic characteristics of water-soluble, N-heterocyclic carbene-based complexes are also described. The increased hydrophilicity of these water-soluble metal complex-based catalysts improves their applicability. Though research based on carbon-carbon coupling reactions is dominating, recent studies demonstrate that water-soluble N-heterocyclic carbene-based complexes can be utilized in the hydrocyanation and metathesis reactions. Compounds formed by the condensation of active carbonyl compounds and primary amines are called Schiff bases. RR’C=NR” is the general structure of Schiff bases, where R”, R’ and R are hydroxyaryl, hydroxyalkyl, cyclohexyl, alkyl, etc. In this chapter, the synthesis of metal complexes from N-heterocyclic carbenes and the synthesis of Schiff base complexes by ligand exchange, metal exchange, amine exchange, coordinated secondary amine oxidation, in situ methods, and direct synthesis methods are described.


Keywords: Catalysis, Metal complexes, N-heterocyclic carbene, Schiff base, Water soluble.

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