Intermolecular attractive forces in triplet excimers:Lhyphen;shaped excimer of naphthalene

摘要

Experimental evidence is presented which indicates that the triplet excimer of naphthalene isLshaped. The preference for anLhyphen;shaped structure is interpreted as a compromise between the dispersion force which favors a coplanar structure and the electrostatic force which favors aPhyphen;shaped structure. The intermolecular attractive forces which are responsible for the formation of triplet excimers (of aromatic hydrocarbons) are therefore similar to those responsible for the formation of the ground state van der Waals dimers.