Synthesis, IR Spectra and Chelation in Some Cu(II) Coordination Compounds with 5X-Uracils and 6X-2 Thiouracils

Department of Chemistry, Herbert H. Lehman College of the City University of New York, Bronx, New York, U.S.A.

Manuscript received 28 October 1977. accepted 14 March 1978

A new series of complex compounds between 6-substituted 2-thiouracils (substituent= H, CH₃, C₃H₇ and NH₂) and CU(Il) was prepared. lR spectroscopy was used to study the bonding characteristics of these compounds. All the 2-thiouracils were shown to act as chelates via the Sat C₍₂₎ and the N₍₃₎ atoms. In a parallel study, 5-substituted uracils (substituent= 1, NO₂) were also shown to act as chelates, but via the O at C₍₂₎ and the N₍₁₎ atoms.