摘要： The preparation, characterization, and mesomorphic properties of two series of tridentate N-salicylidene-2-hydroxyanilines and their metal complexes were described. The crystal and molecular structure of bis[2-hydroxy-4-propyloxy-N-(2-hydroxy-3,4-dipropyloxybenzylidene) aniline]copper(II) were determined by means of X-ray analysis. It crystallizes in the monoclinic space group P2(1)/n and a Z=4. The geometry at Cu super(2+) ions is square pyramidal with a THF solvent molecule coordinated. The core structure was nearly flat, and the intramolecular Cu-Cu atoms were separated by ca. 3.0163(6) Aa. All compounds 2a formed smectic C phases, and copper complexes 1a-Cu were not mesogenic. In contrast, compound 2e and complexes 1b-Cu, 1d-Cu, 1e-Cu, and 1e-Pd exhibited columnar phases. The lack of mesomorphism in 1e-Zn was attributed to a preferred tetrahedral over square planar geometry. A N sub(cell) equal to 2.44-2.92, calculated from powder XRD data within a 9.0 Aa thick indicated that an induced structure correlated by two catenar-shaped molecules was formed in Col sub(h) phases. 出版日期： 2014-04-08 出處： Tetrahedron, 2014-04, Vol.70 (14), p.2389-2399 識別號： ISSN: 0040-4020 識別號： DOI: 10.1016/j.tet.2014.02.030
