Formal encapsulation of [Fe(H2O)6](3+) by {Fe2(hpdta)} units gives a system of S= 13/2 Fe(III)9 oxo clusters showing magnetic hysteresis.
Under solvothermal conditions the unprecedented nonanuclear Fe(III) aggregate [Fe9(mu3-O)4(mu-OH)4(hpdta)4]5- is formed through the formal encapsulation of [Fe(H2O)6]3+ by four [Fe2(hpdta)(H2O)2]+ units: the aggregates have ground state spins of S= 13/2 while the observed hysteresis below 1.8 K results from inter-cluster antiferromagnetic coupling.
Schmitt
Wolfgang
W
Institut fur Anorganische Chemie, Universitat Karlsruhe, Engesserstr. 15, 76128 Karlsruhe, Germany. powell@chemie.uni-karlsruhe.de.
Anson
Christopher E
CE
Wernsdorfer
Wolfgang
W
Powell
Annie K
AK
D005290:Ferric Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D008280:Magnetics; D008958:Models, Molecular; D015394:Molecular Structure; D013237:Stereoisomerism
D005290:Ferric Compounds