Abstract
Several metallomesogens based on enaminoketonato ligands have been prepared. 1‐Amino‐1‐(4′‐butoxy‐4‐biphenyl)oct‐1‐en‐3‐one was synthesized by heterocycle hydrogenolysis in 3‐(4′‐butoxy‐4‐biphenyl)‐5‐amyl‐isoxazole. Liquid crystalline complexes were obtained by reaction of this enaminoketone with nickel(II) or copper(II) acetates. Hydrogenolysis of the heterocycle in 3‐(4‐hydroxyphenyl)‐5‐amylisoxazole led to 1‐amino‐1‐(4‐hydroxyphenyl)oct‐1‐en‐3‐one. The corresponding copper(II) enaminoketonate was then obtained. The subsequent reaction of this compound with 4‐alkoxy‐benzoic acid chlorides gave liquid crystalline complexes with ester bridges in the core. A nematic phase was observed for all the synthesized metallomesogens. The bridging group influence on melting points, mesophase ranges and thermal stability of copper(II)complexes is discussed.
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