Urea-and thiourea-like host structures of catena-[(1,2-diaminopropane)cadmium(II) tetra-µ-cyanonickelate(II)] accommodating aliphatic guests

Abstract

The three-dimensional framework of catena-[(1,2-diaminopropane)cadmium(II) tetra-µ-cyanonickelate(II)] gives a snake-like channel similar to that in the urea-host inclusin compound for straight chain aliphatic guests such as pentane, hexane, heptane and diethyl ether, but a nodel channel like that in the thiourea-host one for the branched aliphatic guests such as tetrachloroethane, 2-chlorobutane, 1,2-dichloropropane and isopropanol, respectively, by changing the arrangement of the 1,2-diaminopropane (= pn) chelate ring coordinated to the Cd atom as revealed in the single crystal structures of Cd(pn)Ni(CN)₄·xG (x= 0.5) inclusion compounds (G = aliphatic guest molecules).