Two series of Er and Yb thiocyanates were studied as SMMs. Some empirical patterns for further development of Er and Yb based SMMs were proposed. The Δeff value for Yb aquathiocyanate is among the highest known for molecular complexes of this Ln.

No abstract

In the crystal structure of guaninidium aqua(ethylenedi9minetetraacetato)bismuthate(III), the ethylenediaminetetraacetato tetraanion chelates to the bismuth atom through its two amino and four carboxyl oxygen atoms. A carboxylate bridge [Bi-0 = 2.694(4) A] links adjacent water-coordinated [Bi-O water = 2.673(4) A] ethylenediaminetetraacetatobismuthate(III) anions into a helical linear chain. The bismuth atom is eight-coordinate in a square-antiprismatic environment. The bismuth atom shows dodecahedral coordination in aminoguanidinium ethylenediaminetetraacetatobismuthate(III). The crystal structure features a short carboxyl bridge [Bi-O = 2.657(4) A] that links the bismuthate anions into a dinuclear entity; adjacent entities are linked by a long carbonyl bridge [Bi-0 = 2.931(4) A] into a linear chain.In both ethylenediaminetetraacetatobismuthates(III), the lone-pair of electrons is stereochemical^ inert.

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