Abstract
Supramolecular dication structures, (CHDA 2+)(crown ethers) and (CHDMA 2+)(crown ethers) complexes, were introduced as counter cations to [Ni(dmit) 2] - anions (S=1/2 spin) (CHDA 2+=trans-1,4-cyclohexanediammonium; CHDMA 2+=1,4-bis(methylammonium)cyclohexane; dmit 2-=2-thioxo-1,3-dithiole-4,5-dithiolate; crown ethers=[12]crown-4, [15]crown-5, or [18]crown-6). The cyclohexane rings, with the -NH 3 + or -CH 2-NH 3 + substituents at trans-1,4-positions, arrange into the crown ethers complexes within the [Ni(dmit) 2] - salts. The cyclohexane rings adopt chair conformations, resulting in sandwich-type (CHDA 2+ or CHDMA 2+)(crown ethers) 2 structures, through N-H... O hydrogen-bonding interactions within the crystals between the ammonium moieties of cations (-NH 3 + or -CH 2-NH 3 +) and the oxygen atoms of the crown ethers. Formations of π-π dimer structures of [Ni(dmit) 2] - anions were observed in all salts. The selections of the dication structures (CHDA 2+ or CHDMA 2+) and the crown ethers, due to the various ring sizes, can influence the intra and interdimer interactions of the [Ni(dmit) 2] - anions in the crystals.
Original language | English |
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Pages (from-to) | 175-186 |
Number of pages | 12 |
Journal | Journal of Supramolecular Chemistry |
Volume | 2 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 2002 Jan 1 |
Externally published | Yes |
Keywords
- Crown ether
- Cyclohexane
- Magnetism
- Supramolecular cation
- [Ni(dmit) ]
ASJC Scopus subject areas
- Chemistry(all)
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry