TRIS-O,PHENANTHROLINE rutheniumII perchlorate dihydrate1, Ru(phenan)3(ClO4)2.2H2O, has been resolved through the antimonyl tartarate to give [α]D20 = + 979° and – 971° and [α]546·120 = + 1869° and – 1863° for the ion Ru(phenan)3++. Burstall2 found [α]579·125 = + 860° and – 815° for the compound Ru(dipy)3I2.2H2O. The orange-red active perchlorates in 6 normal sulphuric acid were oxidized with cerie nitrate to yield the optically active blue ion Ru(phenan)3+++, for which [α]D20 = + 311° and – 303° and [α]546·120 = + 1,246° and –1,256°. Reduction of the unstable oxidized ion with ferrous sulphate regenerated the rutheniumnII complex with its rotation unchanged. It is evident that both the di- and tri-valent ruthenium complexes have a very large abnormal rotatory dispersion.
Dwyer, Humpoletz and Nyholm, J. Proc. Roy. Soc., N.S.W., 80, 212 (1947).
Burstall, J. Chem. Soc., 172 (1936).
About this article
Cite this article
DWYER, F., GYARFAS, E. Persistence of Optical Activity in an Oxidation-Reduction Reaction. Nature 163, 918 (1949). https://doi.org/10.1038/163918b0
Novel synthesis of [Ru(phen)2Br2]X (X=Br, ClO4 or BPh4) and convenient synthesis of bis(2,2′-bipyridine) complexes of ruthenium(III) and tris(2,2′-bipyridine) or (1,10-phenanthroline) complexes of ruthenium(II)
Inorganica Chimica Acta (1990)
Helvetica Chimica Acta (1966)