Synthesis, Crystal Structures, and Thermal Properties of Protic Metal-Containing Ionic Liquids, Diethanolammonium Halometallates: (HOCH2CH2)(2)NH2FeCl4 and ((HOCH2CH2)(2)NH2)(2)CoCl4

摘要

Protic metal-containing ionic liquids with the diethanolammonium cation (HO-CH2-CH2)(2)(DEAH(+)) and anions and (DEAHFeCl(4) (I), (DEAH)(2)CoCl4 (II)) are synthesized. The crystal structures of compounds I and II are determined by X-ray structure analysis (CIF files CCDC nos. 1957208 (I) and 1957189 (II)). Compound I has a layered structure. The layer consists of the DEAH(+) cations with the disordered system of hydrogen bonds and attached anions. The structure of compound II represents a three-dimensional framework consisting of the DEAH(+) cations and anions linked by hydrogen bonds. The thermal analysis shows that the melting points of compounds I (45 degrees C) and II (55 degrees C) are lower than 100 degrees C, the enthalpy of melting of compound I is higher than that of compound II, and the decomposition temperature of compound II (210 degrees C) is higher than that of compound I (128 degrees C).