Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Green and Orange Crystalline Forms of [VO{N-salicylidene-N′-3-ethoxysalicylidene-(R,R)-1,2-cyclohexane-diamine}], Separation of the Diastereomeric Pair, and Isomerization between Them in the Solid State
Masaaki KojimaKiyohiko NakajimaMasanobu TsuchimotoMiki TanakaTetsuya SuzutaYuzo YoshikawaJunnosuke Fujita
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1994 Volume 23 Issue 5 Pages 949-952


A pair of diastereomers, I and II, of the titled complex were separated by liquid chromatography, and each of them crystallized in two different colors, green and orange. I(green) and II(green) were assigned to a mononuclear square pyramidal structure, while I(orange) and II(orange) to a polynuclear linear chain structure. The orange complexes turned green by heating at 195 °C in a few minutes. All of the four complexes undergo isomerization at 195 °C in the solid state to give an equilibrium mixture, I : II ≈ 1 : 1.

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© 1994 The Chemical Society of Japan
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