The spectra of a series of Cr(III)alkyl complexes, (H2O)5CrIIICR1R2R3, were reinvestigated. In addition to the reported three typical absorption bands a new strong band in the 210-260 nm region is detected for most of the complexes studied. The proposed assignments for the two LMCT transitions give a satisfactory explanation to the effect of the substituents Ri.
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We wish to thank Prof. J. H. Espenson for helpful discussions.T his study was supported by grants from the Israel-United States Binational Science Foundation (B.S.F.), Jerusalem and from the