Triptycene is an aromatic hydrocarbon, the simplest iptycene molecule with the formula . It is a white solid that is soluble in organic solvents. The compound has a paddle-wheel configuration with D3h symmetry. It is named after the medieval three-piece art panel, the triptych. Several substituted triptycenes are known. Barrelenes are structurally related. Due to the rigid framework and three-dimensional geometry, derivatives of triptycene have been well-researched.

Synthesis

The parent triptycene was first prepared in 1942 by a multistep method. It can also be prepared in one step in 28% yield from the Diels–Alder reaction of anthracene and benzyne. In this method, benzyne is generated by the reaction of magnesium and 2-bromofluorobenzene.

Derivatives and applications

The hydrocarbon framework is very rigid, and triptycene derivatives such as triptycene quinones are therefore incorporated in many organic compounds as a molecular scaffold for various applications, such as molecular motorss or ligands.

For example, a bis(diphenylphosphino) derivative was used as a phosphine ligand on nickel in a highly selective hydrocyanation reaction of butadiene. The reactivity of this catalyst is attributed to the large bite angle of the bidentate ligand supported by the triptycene framework.

References

External links

• Triptycene MSDS

• Triptycene Dynamic molecular model