The Most Stable and Fully Characterized Functionalized Heptacene

Abstract

Lucky seven: Crystals of heptacene, which consists of seven linearly fused benzene rings, remain stable for at least 21 days in mineral oil and 24 h in degassed solution when the oligoacene is functionalized with phenyl and triisopropylsilylethynyl groups (see scheme). The right combination of functionalities makes this seven-ring system the most stable functionalized heptacene synthesized to date.