VIBRATIONAL STUDIES ON BIS-TERPYRIDINE-RUTHENIUM(II) COMPLEXES

The behaviour of the bis-terpyridine-ruthenium(II) complex is studied with IR and Raman measurements followed by a normal coordinate analysi s. Both in-plane and out-of-plane vibrations of the 2,2',6',2''-terpyr idine unit are analysed. The observed frequencies am reproduced with a n average error of 1.3 % for in-plane and 1.9 % for out-of-plane vibra tions. The force field and the potential energy distribution are prese nted using a 30 atomic approximation of the molecule. The results are compared to the resonance Raman data, giving a qualitative description of the resonant state. In order to obtain the results two specific de uterated analogues of the bis-terpyridine-ruthenium(II) complex were s ynthesized.