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Sn368-: a 2.7 nm naked aromatic tin rod.

In this work, we synthesize naked tin cluster anion Sn368-, representing the first example of pure Sn nanowire assembled through oxidative coupling reactions of a super atomic cluster Sn94-. Theoretical analysis confirm the presence of aromaticity for each Sn9 unit showing four adjacent aromatic subunits bridged by parallel Sn-Sn bonds.