Ferromagnetic coupling in two chain-like nickel(II) tricyanomethanide complexes with polyamines as co-ligands

Two new chain-like nickel(II) tricyanomethanide complexes {[Ni(tmeda)(tcm)(H2O)](tcm)}n (1) and [Ni(dien)(tcm)2]n (2) (tmeda = tetramethylethylenediamine, dien = diethylenetriamine, tcm = tricyanomethanide) have been synthesized and characterized by single crystal X-ray diffraction. Magnetic studies indicate that there are ferromagnetic couplings between adjacent NiII ions in 1 (θ = 7.3 K, C = 0.96 cm3 mol−1 K) and 2 (θ = 1.9 K, C = 1.07 cm3 mol−1 K), respectively.