A new member of a class of rod-like Mn 12 single molecule magnets using 2-(pyridine-2-ly)propan-2-ol.

This paper reports on the synthesis, structure and magnetic properties of a new type of rod like Mn 12 metal cluster, [Mn 12 O 7 (OH) 2 (OMe) 2 (dmhmp) 4 (O 2 CPh) 11 (H 2 O)] (6) where the ligand (dmhmpH) is 2-(pyridine-2-yl)propan-2-ol. Compound (6) was obtained by reacting MnCl 2 ·4H 2 O with dmhmpH in the presence of benzoic salt and Et 3 N. The resulting crystalline material is assigned to the triclinic space group P 1̄. Although compound (6) displays ferromagnetic and antiferromagnetic competition behavior, this does not prevent the molecule from functioning as a single-molecule magnet (SMM). The SMM behavior is evidenced by observing frequency dependent out-of-phase ac signals as well as magnetization hysteresis loops at low temperatures in a micro-SQUID study. A brief comparison between all rod-like Mn 12 materials is also given in the manuscript.