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

Abstract

Recent studies have shown that the coordination modes of the acetylide dianion (C 2 2À , IUPAC name acetylenediide) can be classified into three categories: 1) linear end-to-end Scheme 5. a) TiCl 4 , Et 2 O, 0 8C, 88 %; b) 2-(trimethylsilyloxy)furan, BF 3Ó Et 2 , CH 2 Cl 2 , À 78 8C; c) Burgess reagent, PhH, 55 8C, 80 % (two steps); d) 1n LiOH aq , 238C; 16 % HF aq , 238C, 93 % (1:1.4, 1/21); e) 8 n HCl aq , THF, 23 8C, quant.

Unprecedented Solution‐Stable Silver(I) Ethynediyl Clusters

“…Many interesting compounds containing Ag 2 C 2 as a component have been reported, and most of them have polymeric structures with the component C 2 @Ag n cages sharing common vertices or linked by bridging anions 4. Furthermore, crown ethers have been employed as blocking groups to install protective cordons around the C 2 @Ag n moiety to obtain discrete molecules 5. Unfortunately, their characterization has been limited in the solid state because all known complexes containing Ag 2 C 2 as a constituent decompose quickly when they are dissolved.…”