Abstract
The molecules described possess properties of key electronic components as suggested by the title. These molecules are of the π-σ-π, mixed-valence type and provide double-well potentials for single electrons. The σ bridge proposed is a spirocycloalkane, chosen to provide a high potential barrier and unique stereochemistry that makes the molecules suitable for interconnection in future molecular devices. The theoretical models that reveal these properties are presented and critically examined. © 1988, American Chemical Society. All rights reserved.