The electronic structure of organometallic complexes of the ƒ elements—XI. Absorption spectrum and parameterization of the crystal field splitting pattern of a methyltetrahydrofuran adduct derived from tris(η5-cyclopentadienyl)-praseodymium(III)

Abstract

The low temperature absorption spectrum of tris(η5-cyclopentadienyl)-praseodymium(III) dissolved in a 2-methyltetrahydrofuran glass has been measured. The observed transitions, along with the previously reported magnetic circular dichroism transitions, have been assigned and fitted to the parameters of a semiempirical Hamiltonian with an r.m.s. deviation of 27.2cm−1 for 40 levels. The experimental and calculated magnetic susceptibility of Cp3Pr·butyl acetate (which has an optical spectrum very similar to that of Cp3Pr·MeTHF) as a function of temperature are also given.