Abdullah, N. and Arifin, Z. and Tiekink, E.R.T. and Sharmin, N. and Ahmad Tajidi, N.S. and Mat Hussin, S.A. (2016) Covalent and ionic Cu(II) complexes with cyclam and substituted benzoato ligands: structural, thermal, redox and mesomorphic properties. Journal of Coordination Chemistry, 69 (5). pp. 862-878. ISSN 0095-8972, DOI https://doi.org/10.1080/00958972.2016.1147032.
Full text not available from this repository.Abstract
A covalent mononuclear complex, [Cu(p-HOC6H4COO)2(cyclam)] (1), and two ionic mononuclear complexes, [Cu(cyclam)(H2O)2](p-CH3OC6H4COO)2 (2) and [Cu(cyclam)(H2O)2](p-CH3(CH2)15OC6H4COO)2·H2O (3), were formed from reaction of cyclam with [Cu2(p-HOC6H4COO)4(H2O)2], [Cu2(p-CH3OC6H4COO)4(H2O)2] and [Cu2(p-CH3(CH2)15OC6H4COO)4(H2O)2], respectively. These complexes were isolated as purple crystals with molecular structures showing distorted octahedral N4O2 geometry. Complexes 1 and 2 were irreversibly reduced to Cu(I) and oxidized to Cu(III), while 3 was redox inactive. Complex 2 reacted with N-(hexadecyl)isonicotinamide (L) to form [Cu(cyclam)(L)2](p-CH3OC6H4COO)2 (4). These complexes were thermally stable (Tdec > 200 °C for 1-3 and 174 °C for 4). Complexes 3 and 4 behaved as ionic liquids (melting temperatures lower than 100 °C) and exhibited mesomorphism.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Cu(II); Cyclam; Substituted benzoates; Crystals; Redox; Thermal; Mesomorphism |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 12 Oct 2017 06:56 |
| Last Modified: | 12 Oct 2017 06:56 |
| URI: | http://eprints.um.edu.my/id/eprint/17996 |
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