Structures and Magnetic Properties of Monomeric Copper(II) Bromide Complexes with a Pyridine-Containing Tridentate Schiff Base 


Vol. 34,  No. 12, pp. 3615-3620, Dec.  2013
10.5012/bkcs.2013.34.12.3615


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  Abstract

Two novel copper(II) bromide complexes with pyridine containing Schiff base ligands, Cu(pmed)Br2 and Cu(dpmed)Br2 where pmed = N'-((pyridin-2-yl)methylene)ethane-1,2-diamine (pmed) and dpmed = N,Ndiethyl- N'-((pyridin-2-yl)methylene)ethane-1,2-diamine (dpmed) were synthesized and characterized using Xray single crystal structure analysis, optical and magnetic susceptibility measurements. Crystal structural analysis of Cu(pmed)Br2 showed that the copper(II) ion has a distorted square-pyramidal geometry with the trigonality index of τ = 0.35 and two intermolecular hydrogen bonds, which result in the formation of two dimensional networks in the ab plane. On the other hand, Cu(dpmed)Br2 displayed a near square-pyramidal geometry with the value of τ = 0.06. In both compounds, the NNN Schiff base and one Br atom occupy the basal plane, whereas the fifth apical position is occupied by the other Br atom at a greater Cu-Br apical distance. The reported complexes show g⎟⎜ > g⊥ > 2.0023 with a dx2-y2 ground state and a penta-coordinated square pyramidal geometry. Variable temperature magnetic susceptibility measurements showed that the developed copper(II) complexes follow the Curie-Weiss law, that is there are no magnetic interactions between the copper(II) ions since the Cu--Cu distance is too far for magnetic contact.

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  Cite this article

[IEEE Style]

S. K. Kang, S. J. Yong, Y. Song, Y. Kim, "Structures and Magnetic Properties of Monomeric Copper(II) Bromide Complexes with a Pyridine-Containing Tridentate Schiff Base," Bulletin of the Korean Chemical Society, vol. 34, no. 12, pp. 3615-3620, 2013. DOI: 10.5012/bkcs.2013.34.12.3615.

[ACM Style]

Sung Kwon Kang, Soon Jung Yong, Young-Kwang Song, and Young-Inn Kim. 2013. Structures and Magnetic Properties of Monomeric Copper(II) Bromide Complexes with a Pyridine-Containing Tridentate Schiff Base. Bulletin of the Korean Chemical Society, 34, 12, (2013), 3615-3620. DOI: 10.5012/bkcs.2013.34.12.3615.

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ISSN(Print) 0253-2964
ISSN(Online) 1229-5949