Abstract

Five related mononuclear pentacoordinate complexes of the formula [CoL3Cl2] show slow magnetic relaxation under small applied DC field; L3 – a tridentate N-donor ligand based upon dipyrazolpyridine with an alkyl tail. All of them exhibit a supramolecular assembly, either forming dimers or chains via π–π stacking. Moreover, they display two relaxation branches, one being typical for single molecule magnets of this class, τ∼10−6s, and the second one as slow as τ∼0.5s at T=1.9K.

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