A Comprehensive Study on the Full Series of Alkali‐Metal Selenocyanates <i>A</i><sup>I</sup>[SeCN] (<i>A</i><sup>I</sup>=Li−Cs)
Alena Shlyaykher, Marvin Ehmann, Antti J. Karttunen, Frank Tambornino
Abstract
Abstract The full series of quasibinary alkali‐metal selenocyanates was synthesized either by oxidation of the respective cyanides ( A =Li−Rb) or by metathesis ( A =Cs). For Li[SeCN] only ball‐milling and subsequent annealing led to the isolation of the quasibinary selenocyanate. Their structures were refined from single‐crystal and powder X‐ray data. The respective solid‐state IR and Raman spectra were interpreted with the aid of solid‐state quantum‐mechanical calculations and DSC‐TGA measurements allowed for extraction of melting points. Only for Li[SeCN] a possible phase transition was observed that is discussed on the basis of VT‐PXRD experiments. It is also the only quasibinary selenocyanate to form a hydrate (Li[SeCN] ⋅ 2H 2 O).