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Vol. 26 No. 4 (2014): Vol 26 Issue 4

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Room-Temperature Magnetic Liquid Complexes of 2-Hexyldecanoato Ligand with Cu(II), Ni(II) and Co(II) Ions

https://doi.org/10.14233/ajchem.2014.15714
Norbani Abdullah
Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
Yasameen Al-Hakem
Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
Nazirah Abdullah
Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
Habibah Samsudin
Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
Nur Syamimi Ahmad Tajidi
Department of Chemistry, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia

Corresponding Author(s) : Norbani Abdullah

norbania@um.edu.my

Asian Journal of Chemistry, Vol. 26 No. 4 (2014): Vol 26 Issue 4

Abstract

Three new complexes [Cu2(L)4(LH)2] (1), [Ni2(L)4(EtOH)2(H2O)2].H2O.CHCl3 (2) and [Co2(L)4(H2O)2].3H2O (3), were obtained as coloured viscous liquids at room temperature (30 ºC) and in good yields from the reaction of sodium 2-hexyldecanoate (NaL) with the corresponding MCl2 (M = Cu, Ni or Co). The structural formulae of these complexes were indirectly deduced by a combination of analytical results and additionally for 1, inferred from that of [Cu2(CH3(CH2)5COO)4] (4) obtained as single crystals under similar synthetic conditions. Complexes 1-3 were paramagnetic with weak antiferromagnetic interactions between the two M(II) centres, while 4 has a significantly stronger antiferromagnetic interaction. Complex 3 was also high spin. These complexes were thermally stable: 1 and 2 decomposed at 200 ºC, 3 at 150 ºC and 4 at 280 ºC. However, they were redox inactive in the potential range -1.5 V to + 1.5 V, while only 1 was mesogenic with a hexagonal columnar mesophase (Colh) at -23.2 ºC.

Keywords

2-Hexyldecanoate Cu(II) Ni(II) Co(II) Magnetic Thermal
Abdullah, N., Al-Hakem, Y., Abdullah, N., Samsudin, H., & Syamimi Ahmad Tajidi, N. (2014). Room-Temperature Magnetic Liquid Complexes of 2-Hexyldecanoato Ligand with Cu(II), Ni(II) and Co(II) Ions. Asian Journal of Chemistry, 26(4), 987–990. https://doi.org/10.14233/ajchem.2014.15714
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