Tetrakis(3-cyanopyridine)diisothiocyanatonickel(ii) and its clathrates with EtOH and CH2Cl2: structures, thermal stabilities and enthalpies of guest releaseWerner clathrates. Part 15.10 Electronic supplementary information (ESI) available: XRPD traces for 1–3 and for the product obtained on exposure of 1 to CH2Cl2 vapour; graphical representation of the Clausius–Clapeyron equation for the thermal decomposition of 2 and 3; rotatable 3-D crystal structure diagrams in

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.