Construction of Various Supramolecules by π−π Interactions: Self-Assembly of Nickel(II) Macrocyclic Complexes Containing Pyridine Pendant Arms with Bidentate Ligands
✍ Scribed by Kil Sik Min; Myunghyun Paik Suh
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 605 KB
- Volume
- 2001
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
The supramolecular compounds, [Ni(C 20 H 32 N 8 )(en)]-(ClO 4 ) 2 • 2 H 2 O (1), [Ni(C 20 H 32 N 8 )(isonicotinate) 2 ] (2), and [Ni(C 20 H 32 N 8 )(BQDC)] • 3 H 2 O (3), have been constructed by the self-assembly of a nickel(II) macrocyclic complex containing pyridyl pendant rings, [Ni(C 20 H 32 N 8 )](ClO 4 ) 2 • 2 H 2 O, with ethylenediamine (hereafter noted en), isonicotinic acid, and potassium 2,2Ј-biquinoline-4,4Ј-dicarboxylate, (K 2 BQDC • 3 H 2 O), respectively, in MeCN/H 2 O. The X-ray crystal structure of 1 indicates that one en coordinates a nickel(II) macrocyclic complex to form a folded macrocyclic complex, which ends up with a stacking dimer via C-H•••π and offset face-to-face π-π interactions between the pyridine pendant groups. The X-ray crystal structure of 2 indicates that two isonicotinate ions coordinate a nickel(II) macrocyclic complex at the axial positions and the pyridine groups of the