New Compounds from Tellurocyanide Rhenium Cluster Anions and 3d-Transition Metal Cations Coordinated with Ethylenediamine

The compounds [Ni(en)3]2[Re6Te8(CN)6]·10H2O (1), [Ni(NH3)4(en)]2[Re6Te8(CN)6]·2H2O (2), [Ni(NH3)2(en)2][{Ni(en)2}3{Re4Te4(CN)12}2]·38H2O (3), [Co(NH3)2(en)2]2[{Co(en)2}Re6Te8(CN)6]Cl2·H2O (4),and [{Zn(H2O)(en)2}{Zn(en)2}Re6Te8(CN)6]·3H2O (5) (en = ethylenediamine) have been synthesized and characterized. Compounds 1, 4, and
5 have been synthesized by the diffusion of an aqueous (for 1 and 5) or an ammonia (for 4) solution of Cs4[Re6Te8(CN)6]·2H2O into a glycerol solution of NiCl2·6H2O (for 1), CoCl2·6H2O (for 4), or ZnCl2 (for 5). Compounds 2
and 3 have been synthesized by the reaction of an aqueous solution of Cs4[Re6Te8(CN)6]·2H2O (for 2) or K4[Re4Te4(CN)12]·5H2O (for 3) with an ammonia solution of Ni(en)2Cl2. Compounds 1 and 2 are ionic whereas compounds
4 and 5 are one-dimensional polymers. Compound 3, a two-dimensional polymer, possesses hexagonal shaped
channels of approximate diameter 10−12 Å. Because the framework of compound 3 is robust, it is an attractive
host for guest molecules of appropriate size and shape. The potential “guest” volume is about 37% of the unit cell
volume.