Four new tetranuclear iron(III) complexes of formula [{Fe(L)(2)](3)Fe], 1-4, have been prepared by reacting [Fe(ClO4)(3)] center dot 6H(2)O with H2L in methanol. Here, L2- is the deprotonated form of N-(2-hyrdoxybenzyl)-L-valinol (H2L1), N-(2-hyrdoxybenzyl)-L-leucinol (H2L2), N-(5-chloro-2-hyrdoxybenzyl)-L-leucinol (H2L3), and N-(2-hyrdoxybenzyl)-L-phenylalaninol (H2L4). The complexes are prepared in an enantiomeric pure form. The complexes have been characterized with the help of IR, UV-vis, circular dichroism (CD), H-1, and elemental analyses. The complex [{Fe(L-2)(2)](3)Fe] center dot CH3OH center dot 2H(2)O, 2 center dot CH3OH center dot 2H(2)O, crystallizes in enantiomeric pure form containing a propeller-like Fe4O6 core. H-1 and CD spectral studies of the four species are consistent with the structural similarities of the complexes in solution. Variable-temperature magnetic susceptibility of one case show.; an intramolecular antiferromagnetic coupling between the Fe(III) ions. Magnetic measurements are in accord with the S=5 ground state and suggest single molecular magnet behavior. The magnetic exchange coupling constant between the iron centers within the molecule is interpreted using broken-symmetry density functional theory calculation.