Cover Picture: A New Basic Motif in Cyanometallate Coordination Polymers: Structure and Magnetic Behavior of M(μ‐OH2)2[Au(CN)2]2 (M=Cu, Ni) (Chem. Eur. J. 26/2006)

Abstract

Watery bridges play the key role in a new basic structural motif exhibited by M(μ‐OH2)2[Au(CN)2]2 (M=Cu, Ni) materials. This motif is unique for cyanometallate‐based polymers and rare in aqueous coordination chemistry: a 1D chain propagated by double aqua‐bridges. These metal–water chains, shown here cascading down a rock‐studded waterfall, aggregate through hydrogen bonds to form stacked ribbons in 3D. The magnetic properties of both compounds were studied by using short‐lived subatomic muons as highly sensitive local probes in zero‐magnetic field, as shown here. D. B. Leznoff, J. E. Sonier et al. describe these CuII and NiII cyanoaurate coordination polymers on page 6748 ff.