13.  Binuclear Complexes Containing Barbituric Derivatives as Ligands- Precursors for Supramolecular Structures. I. Synthesis and Spectral Properties of N,N’-bis-(5,5’-diethyl-barbituryl- 1-methyl)-piperazine (VEP) and its Copper(II) Complex

Authors: Carmen Maria Bucovicean, Ramona Tudose and Otilia Costisor


Abstract:

The new Mannich base VEP (N,N’-bis-(5,5’-diethyl-barbituryl-1-methyl)-piperazine), has been synthetized by condensation of veronal with formaldehyde and piperazine following a Mannich procedure. The new binuclear complex Cu2VEP(X)4·4H2O, X=ClO4- where VEP stands for N,N’-bis-(5,5’-diethyl-barbituryl-1-methyl)-piperazine, were obtained by metal - ligand direct synthesis. Tetrahedral geometry of the metal ion was preserved in solution as well in solid state. The binuclear complex contain VEP in a chair conformation.


Keywords: copper(II) complex; Mannich base ligand; barbituric acid derivative

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