Covalent and ionic Cu(II) complexes with cyclam and substituted benzoato ligands: structural, thermal, redox and mesomorphic properties

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.
Official URL: http://dx.doi.org/10.1080/00958972.2016.1147032

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

Actions (login required)

View Item View Item