ELECTRON-STRUCTURE OF ORGANOMETAL COMPLEXES OF F-ELEMENTS .26. SINGLE-CRYSTAL OPTICS AND MAGNETOOPTICS OF NORMO-BUTYLACETATE ADDUCT OF TRIS-(ETA-5-CYCLOPENTADIENYL)PRASEODYMIUM(III)

By comparing the absorption spectrum of an oriented single crystal of the n-butylacetate adduct derived from tris (eta-5-cyclopentadienyl)-praseodymium(III) with the corresponding absorption spectrum run as pellet or solution, the excited terminal crystal field states of A1 and E symmetry, respectively, could be assigned. Additionally, the magnetic circular dichroism spectrum of this complex was recorded in the range 430-2070 nm. From the selection rules for magnetic circular dichroism spectroscopy the dominant 1 +/- J(z) > values in the eigenvectors of some excited E states could be determined. The experimental results agree with the predictions of a previous crystal field calculation.