Concave Hydrocarbons

Abstract

Abstract Concave hydrocarbons, such as 1 (C 36 H 36 ), 4 (C 60 H 60 ), 5 (C 54 H 48 ), and 6 (C 60 H 52 ), represent three‐dimensionally clamped analogues of π‐prismands. They encapsulate small metal ions and accomplish metal‐ion extraction from aqueous solution. Their remarkable selectivity allows applications such as incorporation in ion‐selective electrodes. The synthetic route is based on well‐established cyclophane methodology and, thus, offers a general approach to a whole family of concave hydrocarbons.