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Copper complexes of two isomeric NS2-macrocycles

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Abstract

Two isomeric NS2-macrocycles incorporating a xylyl group at ortho (o -L) and meta (m -L) positions were employed and their copper complexes (1–5) were prepared and structurally characterized. The copper(II) nitrate complexes [Cu(L)(NO3)2] (1: L = o -L, 2: L = m -L) for both ligands were isolated. In each case, the copper center is five-coordinated with a distorted square pyramidal geometry. Despite the overall geometrical similarity, 1 and 2 show the different ligand conformation due to the discriminated packing pattern. Reaction of o -L with copper(II) perchlorate afforded complex 3 containing two independent complex cations [Cu(o -L)(H2O)(DMF)(ClO4)]+ and [Cu(o -L)(H2O)(DMF)]2+; the coordination geometry of the former is a distorted octahedron while the latter shows a distorted square pyramidal arrangement. In the reactions of copper(I) halides (I or Br), o -L gave a mononuclear complex [Cu(o-L)I] (4) with a distorted tetrahedral geometry, while m -L afforded a unique exodentate 2:1 (ligand-to-metal) complex [trans-Br2Cu(m-L)2] (5) adopting a trans-type square-planar arrangement.

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Acknowledgment

This study was supported from WCU project (R32-20003).

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  1. Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju, 660-701, South Korea

    Sunhong Park & Shim Sung Lee

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  1. Sunhong Park
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  2. Shim Sung Lee
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Correspondence to Shim Sung Lee.

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Park, S., Lee, S.S. Copper complexes of two isomeric NS2-macrocycles. J Incl Phenom Macrocycl Chem 71, 429–434 (2011). https://doi.org/10.1007/s10847-011-0017-4

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