Synthesis, Spectra and Bond Studies on a Novel Cu-Ru Complex of Magnetic Dilution

Abstract

A novel complex [Ru(phen)3][Cu(opba)]‧6H2O has been prepared and characterized structurally. The crystal structure showed that the complex consisted of dication [Ru(phen)3]2+and complex dianion [Cu(opba)]2–. The IR, Uv-vis, EPR spectra were studied, and EPR spectra showed hyperfine structure from copper isotopes63Cu and65Cu, and superhyperfine(shf) from14N coupling, giving parameters g// = 2.207，g = 2.026，A//Cu= 196 G，ACu= 43 G，A//N= 13 G，AN= 17 G. The bond parameters were evaluated based on the EPR spectra, indicating substantial π-bonding character in the Cu–N and Cu–O bonds in the complex [Cu(opba)]2–. The spin density on nitrogen and oxygen atoms is 0.081 and 0.195, respectively.