No abstract

General properties of the MCD of cupric ions in ligand fields of low symmetry are described. C terms arising from spin-orbit coupling are dominant at liquid helium temperatures If spin-orbit coupling of the excited states to the ground state is negligible compared with spin-orbit coupling of the excited states among themselves, then the C values for the transitions sum to zero. It follows that nonvanishing of the sum of the C values over all transitions is due to spin-orbit coupling with the ground state. This net rotational offset is calculated for hybrid orbital ‘‘united atom’’ models of the electronic states of the metal–ligand complexes. Simulations of C term spectra from hybrid atomic orbital models illustrate relations between MCD features and properties of low symmetry cupric sites.

No abstract

This suggests that if 'complexes' are prepared in which a large drop in the intensity of this band is observed, then, in all probability, an attack has taken place on the porphyrin ring rather than a simple change in the coordination to the iron (see following paper). The m-and fl-bands are more intense in low-spin than in high-spin complexes (see Table 1). The intensity of the oband in low-spin complexes is very dependent on Vol. 78 247