Synthesis, characterization and thermal behaviour of solid phases in the quasi-ternary system Mg(SCN)₂–H₂O–THF

Abstract

Mg(SCN)2 ⋅ 4 H2O can be converted into previously unknown compounds Mg(SCN)2 ⋅ (4-x) H2O ⋅ x THF with x = 0, 2 and 4 by multiple recrystallization in tetrahydrofuran...

Synthesis, Crystal Structure and Properties of a new Hydrate of Manganese Thiocyanate with the Composition Mn(NCS)2(H2O)2

“…Surprisingly only one band is observed, even if single and double bridging anionic ligands are present, but this band is relatively broad and a small shoulder appears at about 2070 cm −1 . The band at 919 cm −1 can be assigned to the bending vibration and that at 778 cm −1 to the C−S stretching vibration of the thiocyanate anions [17] …”

“…The band at 919 cm À 1 can be assigned to the bending vibration and that at 778 cm À 1 to the CÀ S stretching vibration of the thiocyanate anions. [17] For the tetrahydrate and the anhydrate, no IR spectroscopic data were found but for comparison they were also measured. The IR spectrum of the tetrahydrate is similar to that one of the dihydrate.…”

“…Single‐crystal structure determinations prove the formation of a compound with the composition Mn(NCS) 2 (H 2 O) 2 , which represents a hitherto unknown hydrate of Mn(NCS) 2 . In this context it is noted, that some new hydrates and solvates of alkali‐ and alkaline‐earth metal thiocyanates were recently reported [15–17] …”

“…In this context it is noted, that some new hydrates and solvates of alkali-and alkaline-earth metal thiocyanates were recently reported. [15][16][17] However, with the 3d metals Mn, Fe, Co, Ni, Cu and Zn not many hydrates of transition-metal thiocyanates are known. With other coordinating donor ligands these metal cations frequently form compounds with a similar stoichiometry and similar crystal structures and several of them are isotypic.…”

Ion transport mechanism in anhydrous lithium thiocyanate LiSCN Part I: ionic conductivity and defect chemistry

“…An even more extreme situation is observed for Mg 2+ , for which thiocyanate hydrates rather decompose upon drying than form Mg-S bonds. 53 The strong tendency of Mg 2+ in magnesium thiocyanates to coordinate with oxygen containing molecules (compared to e.g. Zn 2+ and Co 2+ ) 54 suggests that this cation has a strong preference for electrostatic interactions with negatively charged species.…”