Abstract
Two new salts, [BzTPP]2[Cu(mnt)2] (1) and [4NO2BzTPP]2[Cu(mnt)2] (2) (BzTPP+ = benzyltriphenylphosphonium and mnt2− = maleonitriledithiolate) have been prepared and characterized by elemental analyses, UV, IR, molar conductivity and single-crystal X-ray diffraction. The single-crystal structure analysis shows that 1 crystallizes in the monoclinic space group P21/n, while 2 crystallizes in the triclinic space group P−1. The effects of weak intramolecular interactions such as C–H···O, C–H···S, C–H···N, C–H···Cu hydrogen bonds and p···π, π···π stacking interactions in the solids generate a 3D network structure. It is noted that the change in the molecular topology of the counteraction when the 4-substituted group in the benzyl ring is changed from H to NO2 results in differences in the crystal system, space group, weak interactions and the stacking mode of the cations and anions of 1 and 2. The magnetic susceptibilities of these salts measured in the temperature range 2.0 to 300 K show weak ferromagnetic coupling features with θ = 2.05 × 10−2 K for 1 and 5.13 × 10−3 K for 2.
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Acknowledgments
The authors thank the Science and Technology Project (Nos. 2007B011000008, 2008B080703005) from Guangdong Science and Technology Department and the President’s Science Foundation of South China Agricultural University (No. 2008X015) for financial support of this work.
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Chen, X., Yin, WT., Huang, Q. et al. Syntheses, weak interactions, 3D network structures and magnetic properties of two salts based on bis(maleonitriledithiolate)copper(II) anion and substituted triphenylphosphonium cation. Transition Met Chem 35, 143–149 (2010). https://doi.org/10.1007/s11243-009-9307-8
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DOI: https://doi.org/10.1007/s11243-009-9307-8