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Issue 12, 2013
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Syntheses, structure diversity and properties of complexes with 4-acyl pyrazolone salicylidene hydrazide derivatives

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Abstract

Five new complexes [Zn(HL1)(OAc)(CH3CH2OH)] (1), [Cd2(HL1)2(OAc)2(CH3CH2OH)2] (2), [Cu6(L1)6] (3) (H2L1 = N-(1-phenyl-3-phenmethyl-4-phenylethylene-pyrazolone-5)-salicylidene hydrazide, OAc = acetate anion), {[Zn(L2)(CH3OH)]·(CH3OH)}n (4) (H2L2 = N-(1-phenyl-3-phenmethyl-4-ethylene-pyrazolone-5)-salicylidene hydrazine), [Cu(L3)]n (5) (H2L3 = N-(1-phenyl-3-phenmethyl-4-benzylidene-pyrazolone-5)-salicylidene hydrazide) have been synthesized and characterized by chemical and spectroscopic techniques. Complexes 1–3 feature mononuclear, dinuclear and rare hexanuclear structures, respectively. The different molecular structures and different coordination modes of H2L1 in complexes 1–3 indicate that the coordination geometry of the metal atoms have a remarkable impact on the structure of these complexes. Complexes 4 and 5 have 1D chain structures. Comparing complexes 4 and 1 or 5 and 3, it can be concluded that the substituents at the 4-position of the ligands have a significant effect on the structure of the resulting complexes. It is worth noting that N(2) atoms of the pyrazolyl ring play an important role in building the two-dimensional networks for 1 and 2 by hydrogen bonds, a novel hexanuclear unit for 3, and the 1D polymer chain for 4 and 5 by bridging bonds. Complexes 1, 2 and 4 show strong fluorescent behavior in the solid state. The magnetic property of complex 3 shows the presence of intramolecular antiferromagnetic exchange (J = −8.63 cm−1).

Graphical abstract: Syntheses, structure diversity and properties of complexes with 4-acyl pyrazolone salicylidene hydrazide derivatives

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Publication details

The article was received on 05 Nov 2012, accepted on 07 Dec 2012 and first published on 10 Dec 2012


Article type: Paper
DOI: 10.1039/C2DT32641H
Citation: Dalton Trans., 2013,42, 4248-4257
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    Syntheses, structure diversity and properties of complexes with 4-acyl pyrazolone salicylidene hydrazide derivatives

    L. Zhang, G. Xu, Y. Yang, J. Guo and D. Jia, Dalton Trans., 2013, 42, 4248
    DOI: 10.1039/C2DT32641H

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