Tetrakis(3-cyanopyridine)diisothiocyanatonickel(ii) and its clathrates with EtOH and CH2Cl2: structures, thermal stabilities and enthalpies of guest release

Abstract

The structures of the α-host complex, Ni(NCS)₂(3-cyanopyridine)₄, 1, and its clathrates with EtOH, 2, and CH₂Cl₂, 3, have been elucidated. The enthalpies of the guest release reaction have been determined by applying the Clausius–Clapeyron equation to the guest vapour pressure vs. temperature data for the thermal decomposition of the solid inclusion compounds. XRPD and thermal analysis studies show the sorption–desorption process 1↔3, and the guest exchange reactions 2↔3, to be fully reversible.