Abstract
Three complexes, [3RBzIQl]2[Cu(mnt)2] (mnt2− = maleonitriledithiolate; [3RBzIQl]+ = 1-(3′-R-benzyl)isoquinolinium, R = Cl (1), I (2) or NO2 (3)), have been prepared and characterized by spectroscopic and physicochemical methods as well as by X-ray crystallography. The [Cu(mnt)2]2− anions formed a 1D chain in complex 1, a dimer in 2 and a sheet structure in 3 through C···N and/or N···N interactions. The neighboring dimers of the cations arranged in a boat-type pattern stack into columns through weak π···π, Cl···π or O···π, C–H···π interactions. The anions and cations stack together into a columnar structure with a ···A–CC–A–CC–A··· sequence. The magnetic susceptibilities measured in the temperature range 2.0–300 K reveal that complex 1 undergoes a change from weak ferromagnetic to antiferromagnetic exchange around 132 K, while 2 shows antiferromagnetic behavior and 3 shows a weak ferromagnetic interaction when the temperature is lowered.
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Acknowledgments
This research was supported by the Science and Technology Project (No. 2014A010105037) from Guangdong Science and Technology Department and the university students’ innovative training project (No. 201410564195) from Education Department of Guangdong Province.
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Zhang, Z., He, WE., Liao, X. et al. Synthesis, crystal structures and magnetic properties of three complexes containing bis(maleonitriledithiolate) copper(II) anion and meta-substituted benzyl isoquinolinium cations. Transition Met Chem 41, 249–259 (2016). https://doi.org/10.1007/s11243-015-0016-1
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DOI: https://doi.org/10.1007/s11243-015-0016-1