Initial example of a triangular single-molecule magnet from ligand-induced structural distortion of a [MnIII3O]7+ complex.
The reaction of [Mn3O(O2CR)6(py)3](ClO4) (R = Me, Et) with methyl 2-pyridyl ketone oxime (mpkoH) in a 1:3 molar ratio in MeOH/MeCN leads to [Mn3O(O2CR)3(mpko)3](ClO4) in 80-90% isolated yield. Ferromagnetic exchange interactions between the three MnIII ions in the nonplanar [MnIII3O]7+ triangular core lead to a spin ground state of S = 6; single-crystal studies reveal the temperature and sweep rate dependent hysteresis loops expected for a single-molecule magnet.
Stamatatos
Theocharis C
TC
Department of Chemistry, University of Patras, 26504 Patras, Greece.
Foguet-Albiol
Dolos
D
Stoumpos
Constantinos C
CC
Raptopoulou
Catherine P
CP
Terzis
Aris
A
Wernsdorfer
Wolfang
W
Perlepes
Spyros P
SP
Christou
George
G