Syntheses, crystal structures and magnetic properties of two cyano-bridged copper(I)–copper(II) mixed-valence complexes

Abstract

Abstract Two cyano-bridged copper(II)–copper(I) mixed-valence assemblies, Cu(EAM)2[Cu(CN)2]2 1 (EAM = ethanolamine) and Cu(DETA)[Cu(CN)2]2·0.5H2O 2 (DETA = diethylenetriamine), have been prepared and structurally and magnetically characterized. IR spectra indicate the presence of bridging cyano groups in both 1 and 2, confirmed by structure analyses; Cu(I)–CN–Cu(II), Cu(I)–CN–Cu(I) and Cu(I)–Cu(I) metal bond linkages are evident. In the lattice, a 3D network is formed by two [Cu(CN)2] − units and one [Cu(EAM)2]2+unit for 1. Variable temperature magnetic susceptibilities, measured in the 5–300 K range, indicate weak antiferromagnetic exchange interactions in complex 1. Keywords: Mixed-valenceCyanideEthanolamineDiethylenetriamineCrystal structureMagnetic properties Acknowledgements This work was supported by the National Natural Science Foundation of China (No. 50572040).