Copper(II) Complexes Containing N,N′-Bidentate N-(Pyridin-2-ylmethyl)aniline and Its Derivatives: Synthesis, Structure and Magnetic Property

• Published in: Bulletin of the Korean Chemical Society Vol. 37; no. 1; pp. 27 - 32
• Main Authors: Ahn, Seoung Hyun, Lee, Hyosun
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley-VCH Verlag GmbH & Co. KGaA 01.01.2016; Wiley‐VCH Verlag GmbH & Co. KGaA; 대한화학회
• Subjects: Dinuclear copper(II) complex; Magnetic susceptibility; Molecular structure; Polynuclear copper(II) complex; 화학
• ISSN: 1229-5949; 0253-2964; 1229-5949
• DOI: 10.1002/bkcs.10616

New Cu(II) complexes, dinuclear [CuLb(μ‐Cl)Cl]2 and monomeric [CuLcCl2], along with polynuclear [CuLaCl2]n for comparison, were prepared and characterized using X‐ray crystallography. Variable‐temperature (2−300 K) magnetic susceptibility (χ) data of [CuLaCl2]n and [CuLb(μ‐Cl)Cl]2 showed weak antiferromagnetic interactions through the bridged chlorido groups within the polymeric and dimeric units, respectively. The reaction between [CuCl2 . 2H2O] and N,N′‐bidentate N‐(pyridin‐2‐ylmethyl)aniline (La ) and its derivatives (Lb and Lc ) in methanol yielded new Cu(II) complexes; namely polynuclear [CuLaCl2 ]n , dinuclear [CuLb (μ‐Cl)Cl]2 , and mononuclear [CuLcCl2 ], respectively. Monomeric [CuLcCl2 ] showed a distorted square planar geometry around copper metal‐based on X‐ray crystallography. The polymeric [CuLaCl2 ]n and dimeric [CuLb (μ‐Cl)Cl]2 had a chloro‐bridged five‐coordinated and a distorted square pyramidal geometry around the Cu(II) center. The Cu∙∙∙Cu′ distance was 3.915(1) Å in [CuLaCl2 ]n and 3.928(1) Å in [CuLb (μ‐Cl)Cl]2 . Interestingly, magnetic susceptibility (χ) measurements of complexes [CuLaCl2 ]n and [CuLb (μ‐Cl)Cl]2 exhibited a weak antiferromagnetic interaction.