Electron-Paramagnetic-Res Spectra of Cu²⁺ Doped Potassium Tetranitroplatinate(II)

Abstract

The e.p.r . spectrum of Cu²⁺ doped into single crystals of K₂Pt(NO₂)₄ is reported. In contrast to the host lattice, which contains four nitrogen-bonded nitrite groups, superhyperfine structure due to coupling with the nitrogen nuclear spins suggests that the guest Cu(NO₂)₄^2- complex contains two nitrites bonded through nitrogen, and two coordinated through oxygens probably asymmetrically chelated . The likely structure and orientation of the copper(II) complex is discussed, and the g and A tensors are interpreted in terms of the ground-state wavefunction parameters.