One-Dimensional Helical Metal Coordination Polymer: Synthesis and Structure of Infinite Chain of [Ag7(S2CNEt2)6] n + (as [SbF6]− salt) Composed of Ag6(S2CNEt2)6 Cluster Units Linked by Ag(I) Ions via Peculiar Chelating S–S Bites

Abstract

A new polymeric silver cluster, formulated as [Ag7(S2CNEt2)6][SbF6] (1) was synthesized and characterized by single-crystal X-ray crystallography. The structure can be described as an infinite cationic polymeric helical chain consisting of two [Ag6(S2CNEt2)6] clusters linked by a silver ion tetrahedrally coordinated with four sulfur atoms, two from each of the constituent clusters. The stereochemistry of 1 is classified as a new ζ-modification of silver dithiocarbamate cluster. It is suggested that the constituent [Ag6(S2CNEt2)6] clusters in 1 can be used as building blocks in the construction of 1-D cluster-based metal coordination polymers as well as 2-D or 3-D cluster-based metal–organic frameworks. The paper reports the synthesis and single-crystal structure of an infinite helical chain of a cationic metal coordination polymer consisting of two [Ag6(S2CNEt2)6] clusters linked by a tetrahedrally coordinated silver ion. The implication of the utility of the constituent [Ag6(S2CNEt2)6] clusters as building blocks in the construction of other 1-D cluster-based metal coordination polymer as well as 2-D or 3-D cluster-based metal–organic-frameworks is discussed.