R. Gleiter et al., LONG-RANGE INTERACTIONS BETWEEN NONCONJUGATED PI-SYSTEMS - ON THE INTERACTION OF 2 CPCO-STABILIZED CYCLOBUTADIENE UNITS, Tetrahedron letters, 34(50), 1993, pp. 8075-8078
By means of cyclovoltammetry on CpCo stabilized biscyclobutadiene supe
rphanes separated by either four tri-, four penta- or four heptamethyl
ene bridges an interaction between the CpCoCb units is detected for al
l three molecules.