Crown-Ether-Directed Assembly of Discrete and One-Dimensional Silver Aggregates Containing Embedded Acetylenediide

Abstract

Silver double salts containing embedded C22− ions have been isolated by using [15]crown-5 (15C5) as a structure-directing agent. Unprecedented low dimensionalities are found for these compounds, which exist either as discrete molecules or as a zigzag chain. They feature different kinds of silver cages each sandwiched by a pair of η5-15C5 ligands: pentagonal bipyramidal C2@Ag7 (see picture) and (C2)2@Ag13 double cage (two square antiprisms sharing a common triangular face).