Three new trinuclear heterometallic NiII-MnII complexes have been synthesized using a [NiL] metalloligand, where H 2L = N,N′-bis(salicylidene)-1,3-propanediamine. The complexes [(NiL)2Mn(OCnn)2(CH3OH)2] ·CH3OH (1), [(NiL)2Mn(OPh)2(CH 3OH)2][(NiL)2Mn(OPh)2]·H 2O (2), and [(NiL)2Mn(OSal)2(CH 3OH)2]·2[NiL] (3) (where OCnn = cinnamate, OPh = phenylacetate, OSal = salicylate) have been structurally characterized. In all three complexes, in addition to the double phenoxido bridge, the two terminal NiII atoms are linked to the central MnII by means of a syn-syn bridging carboxylate, giving rise to a linear structure. Complexes 1 and 2 with Ni-O-Mn angles of 97.24 and 96.43°, respectively, exhibit ferromagnetic interactions (JNi-Mn = +1.38 and +0.50 cm-1, respectively), whereas 3 is antiferromagnetic (JNi-Mn = -0.24 cm-1), having an Ni-O-Mn angle of 98.51°. DFT calculations indicate that there is a clear magneto-structural correlation between the Ni-O-Mn angle and JNi-Mn values, which is in agreement with the experimental results.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry