IngentaConnect Synthesis, characterization, crystal structure and magnetic prope...

Authors: Tao, Rao-Jie¹; Li, Fu-An¹; Zang, Shuang-Quan¹; Cheng, Yan-Xiang²; Wang, Qing-Lun³; Niu, Jing-Yang¹; Liao, Dai-Zheng³

Source: Journal of Coordination Chemistry, Volume 59, Number 8, 20 May 2006 , pp. 901-909(9)

Publisher: Taylor and Francis Ltd

Abstract:

An asymmetrical double Schiff-base Cu(II) mononuclear complex, HCuLp (H 3 Lp is N-3-carboxylsalicylidene-N′-5-chlorosalicylaldehyde-1,3-diaminopropane) and a heterometal trinuclear complex with double molecular structure (CuLp) 2 Co·5H 2 O have been synthesized and characterized by means of elemental analyses, IR and electronic spectra. The crystal structure of the heterotrinucler complex was determined by X-ray analysis. Each asymmetric unit within the unit cell of the complex contains two heterotrinuclear neutral molecules (a) [CuLpCoCuLp], (b) [(CuLpH 2 O)CoCuLp] and four uncoordinated water molecules. In the two neutral molecules, the central Co 2+ ions are located at the site of O 6 with a distorted octahedral geometry, one terminal Cu 2+ ion (Cu(3)) at the square-pyramidal environment of N 2 O 3 , and the other three at the square planar coordination geometry with N 2 O 2 donor atoms. Magnetic properties of the heterotrinucler complex have been determined in the temperature range 5–300K, indicating that the interaction between the central Co 2+ ion and the outer Co 2+ ions is antiferromagnetic. The exchange integral J is equal to−34.9(7)cm −1 .

Keywords: Asymmetrical double Schiff base; Heterotrinuclear complex; Crystal structure; Magnetic property

Document Type: Research article

DOI: 10.1080/00958970500438094

Affiliations: 1: Chemistry and Chemical Engineering College of Henan University, Kaifeng 475001, China 2: Laboratory of High Molecular Chemistry, Changchun Applied Chemistry Institute, Changchun, Jilin 130022, China 3: Department of Chemistry, Nankai University, Tianjin 300071, China

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Synthesis, characterization, crystal structure and magnetic property of asymmetrical double Schiff base heterotrinuclear complex: Cu(II)–Co(II)–Cu(II)