Zur diamagnetischen Anisotropie im [2.2]Metacyclophan

In order to furnish a reliable interpretation of the1H-NMR spectrum of [2.2]metacyclophane (1) based on the ring current theory two basic conditions must be fullfilled: The shifts calculated on the basis of these assumptions are in agreement with the actual spectrum. Moreover, it can be shown that for basic reasons a quantitative approach to the chemical shift of the methylene protons in the bridgevia ring current theory is impossible.