A novel undecametallic iron(III) cluster with an S = (11)/(2) spin ground state.
The reaction of [NEt(4)](2)[Fe(2)OCl(6)] with sodium benzoate, 4,6-dimethyl-2-hydroxypyrimidine (dmhp), and 1,1,1-tris(hydroxymethyl)ethane (H(3)thme) gives the undecametallic compound [NEt(4)][Fe(11)O(4)(O(2)CPh)(10)(thme)(4)(dmhp)(2)Cl(4)]. X-ray crystallography, EPR spectroscopy, bulk magnetic susceptibility studies, and low-temperature single-crystal magnetic measurements were used to characterize the compound. Magnetic measurements indicate an S = (11)/(2) ground state with the parameters g = 2.03 and D = -0.46 cm(-)(1). Single-crystal magnetic studies show hysteresis of molecular origin at T < 1.2 K with fast quantum mechanical tunneling at zero field.
Jones
Leigh F
LF
Department of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK.
Brechin
Euan K
EK
Collison
David
D
Helliwell
Madeleine
M
Mallah
Talal
T
Piligkos
Stergios
S
Rajaraman
Gopalan
G
Wernsdorfer
Wolfgang
W