FARADAY MAGNETO OPTICAL (MCD) ACTIVITY IN CUBIC COMPLEXES

Address of Robert G. Denning: University of Oxford, Oxford, England, since September 1968.""Author Institution: Department of Chemistry, North Carolina State University; Department of Chemistry, University of IllinoisMagneto-optical rotational strengths of d-d and charge-transfer electronic transitions were measured using MCD spectroscopy. Magnetic fields ranging from 25 000 gauss to 45 000 gauss were employed. The metal ions of most compounds investigated were in the environment of octahedral ($O_{h}$) microsymmetry. The magnitudes of Faraday parameters A(a$\rightarrow$j), B(a$\rightarrow$j) and C(a$\rightarrow$j), and of dipole strengths D(a$\rightarrow$j) were obtained from these experiments. Also, the magnitudes, signs, and usefulness of newly defined magneto-optical $g_{p}$-values for Faraday parameters, P = A, B, and C, of each electronic transition $a\rightarrow j$ will be discussed. {g}^{^{o}K}_{P}[{P}({a}\rightarrow {j})]=\frac{[\vartheta({P})]^{^{o}K}_{M \max}}{\epsilon_{\max}}\times 10^{4} Experimental evidence for magnitudes of excited-state orbital angular momenta will be presented. In a number of compounds parameter A(a$\rightarrow$j) will be considered within the framework of Stephens proposed vibronic intensity mechanism