Abstract
A mononuclear five‐coordinate Cu(II) complex [Cu(12‐TMC)Cl][B(C6H5)4] (1) (12‐TMC = 1,4,7,10‐tetramethyl‐1,4,7,10‐tetraazacyclododecane) with distorted square pyramidal geometry has been synthesized and characterized by single‐crystal X‐ray diffraction, direct‐current and alternating‐current magnetic measurements and electron paramagnetic resonance (EPR) spectroscopy. The complex displays slow magnetic relaxation under an external dc field. The analysis of the field‐ and temperature‐dependence of the relaxation rates suggests that the slow dynamics of the magnetization is dominated by the Raman‐like process in the temperature range of 1.8 K to 11 K under an applied dc field of 0.15 T. In addition, the results of magnetic dynamics for the diluted sample with diamagnetic Zn(II) ions confirms the molecular origin of slow magnetic relaxation.
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