Three new trinuclear heterometallic Ni II -Mn II complexes have been synthesized using a [NiL] metalloligand, where H 2 L = N,N′-bis(salicylidene)-1,3-propanediamine. The complexes [(NiL) 2 Mn(OCnn) 2 (CH 3 OH) 2 ] ·CH 3 OH (1), [(NiL) 2 Mn(OPh) 2 (CH 3 OH) 2 ][(NiL) 2 Mn(OPh) 2 ]·H 2 O (2), and [(NiL) 2 Mn(OSal) 2 (CH 3 OH) 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 Ni II atoms are linked to the central Mn II 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 (J Ni-Mn = +1.38 and +0.50 cm -1 , respectively), whereas 3 is antiferromagnetic (J Ni-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 J Ni-Mn values, which is in agreement with the experimental results.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry