Synthesis, spectroscopic investigations, X-ray crystallographic studies and magnetic properties of heterobimetallic Fe(II)–Hg(II) polynuclear complexes

Abstract

Two novel heterometallic complexes with Hg(II) and Fe(II) as coordination centres have been synthesised and characterised by means of infrared, single crystal X-ray diffraction and magnetic measurements. The compounds FeHg(SCN)₄(C₃H₇NO)₂ (FMTF) and FeHg(SCN)₄(N₂H₄CS)₄ (TMTF) form supramolecular framework structures. The FMTF adopts a multidimensional structure, while TMTF creates a one-dimensional chain extending along the crystallographic direction [0 0 1]. Variable temperature magnetic susceptibility measurements show different degrees of deviation from Curie modelled behaviours. In both salts, large zero field splitting mainly contributes to their downturns, while in TMTF, the antiferromagnetic interactions within the chains should also be taken into account.

Keywords:

• Thiocyanate
• Iron(II)
• Crystal structure
• Magnetic measurements
• Zero field splitting

Appendix

Supplementary data

CCDC 892098 and 892099 contain the supplementary crystallographic data for FMTF and TMTF respectively. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via http://www.ccdc.cam.ac.uk/data_request/cif

Acknowledgements

The authors acknowledge the financial support of the Youth Scientist Fund of Shandong Province (grant no. BS2011CL025), the Foundation for the Author of National Excellent Doctoral Dissertation of China (grant no. 200539), the National Natural Science Foundations (grant nos. 50872067 and 51102155), the Science Foundation of Shandong Province (grant no. ZR2010EM039), the Project sponsored by SRF for ROCS, SEM, the China Postdoctoral Science Foundation Funded Project (grant no. 20100470040) and the Scientific Research Foundation for the Returned Overseas Scholars in Jinan (grant no. 20100406).