Abstract
The synthesis, characterization, thermal behavior and magnetic properties of a number of bis[2′-(4-alkyloxyphenyl)malondialdehyde] nickel(II) complexes are reported. X-ray studies of the nickel(II) complexes were performed. It was found that the nickel(II) complexes show liquid-crystalline smectic A phases over a broad temperature range with low melting points. The temperature-dependent magnetic susceptibility measurements of the bis[2′-(4-decyloxyphenyl)malondialdehyde] nickel(II) complex were carried out in the range of 4.2–480 K. The temperature dependent magnetic susceptibilities and magnetic moments of this compound (μeff=3.27 μ B at 300 K) indicate that the nickel centers are octahedrally coordinated. Models for the molecular arrangement in the crystalline and liquid-crystalline phases are discussed on the basis of the magnetic data. In spite of the oxygen bridge between the nickel centers, no exchange interactions were found in the crystalline and liquid-crystalline phases.
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A. M. Giroud-Godquin and P. M. Maitlis:Angew. Chemie Int. Ed. Engl. 30, 375 (1991).
P. Espinet, M. A. Esteruelas, L. A. Oro, J. L. Serrano and E. Sola:Coord. Chem. Rev. 117, 215 (1992).
S. A. Hudson and P. M. Maitlis:Chem. Rev. 93, 861 (1993).
K. Griesar, Y. Galyametdinov, M. Athanassopoulou, I. Ovchinnikov and W. Haase:Advanced Materials 5, 381 (1994).
V. Salas Reyes, G. Soto Garrido, C. Aguilera, K. Griesar, M. Athanassopoulou, H. Finkelmann and W. Haase:Molecular Materials, in press.
R. Paschke, S. Diele, I. Letko, A. Wiegeleben, G. Pelzl, K. Griesar, M. Athanassopoulou and W. Haase:Liquid Crystals, submitted.
Y. Galyametdinov, G. Ivanova, K. Griesar, A. Prosvirin, I. Ovchinnikov and W. Haase:Adv. Mater. 4, 739 (1992).
A. B. Blake, J. R. Chipperfield, S. Clark and P. G. Nelson:J. Chem. Soc. Dalton Trans. 1159 (1991).
W. Haase, K. Griesar and C. Erasmus-Buhr:Electrical, Optical and Magnetic Properties of Organic Solid State Materials, Eds. L. Y. Chiang, A. F. Garito and D. J. Sandman,Mat. Res. Soc Symp. Proc. 247, 455 (1992).
R. Paschke and D. Balkow:Liquid Crystals, submitted.
R. A. W. Johnstone and M. E. Rose:Tetrahedron 35, 2169 (1979).
G. M. Coppola, G. E. Hartmann and B. S. Huegi:J. Het. Chem. 11, 51 (1974).
Z. Arnold:Coll. Czech. Chem. Commun. 26, 3051 (1961).
L. Merz and W. Haase:J. Chem. Soc. Dalton Trans. 875 (1980).
A. Weiss and H. Witte:Magnetochemie, Verlag Chemie, Weinheim, Germany, pp. 76–95 (1973).
A. de Vries, A. Ekachai and N. Spielberg:J. Phys. (Paris)40, C-147 (1979).
A. J. Leadbetter: inMolecular Physics of Liquid Crystals, Ed. G. R. Luckhurst and E. W. Gray, Academic Press, London, ch. 13 (1979).
A. T. Casey and S. Mitra: ‘Magnetic behaviour of components containingd n ions’, inTheory and Applications of Molecular Paramagnetism, Eds. E. A. Boudreaux and L. N. Mulay, Wiley (1976).
R. L. Carlin:Magnetochemistry, Springer Verlag, Berlin-Heidelberg, pp. 12–28 (1986).
A. Weiss and H. Witte:Magnetochemie, Verlag Chemie, Weinheim, Germany, pp. 171–180 (1973).
B. Baumgartner: Ph. D. Thesis, Darmstadt (1987).
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Haase, W., Reyes, V.S., Athanassopoulou, M. et al. Mesogenic and magnetic properties of nickel(II) complexes formed from 2′-(4-alkyloxyphenyl)malondialdehydes. Mol Eng 3, 321–327 (1994). https://doi.org/10.1007/BF01003756
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DOI: https://doi.org/10.1007/BF01003756