Angewandte Chemie International Edition
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Cover Picture (Angew. Chem. Int. Ed. Engl. 13/1994)
The cover picture shows the electron density distribution for the tetracyanoethylene radical anion as calculated with a hybird model using a minimal basis set of atomic orbitals (pz oritabls for C and N) and a multipolar expansion of the spin density. The picture shows the best agreement with the experimental data obtained by neutron diffraction. The significant electron density apparent at the nitrogen atoms is necessary for magnetic interactions. More on the analysis is given by J. S. Miller et al. on p. 139ff.