Low-temperature magnetic studies of a linear trimeric nickel compound: abcjkl-hexa-aqua-def;ghi-hexakis[µ-1,2,4-triazole-N1N2]-tri-nickel(II) hexanitrate dihydrate

Abstract

Magnetic studies of the title compound show that the trimer has an S= 1 ground state with a negligible zero-field splitting (z.f.s.). The magnetic moment can be fitted to two sets of parameters: (a)g= 2.069, J= 7.58 cm^–1, J₃₁=–24.59 cm^–1, and Nα= 2.46 × 10^–9 m³ mol^–1; and (b)g= 2.048, J=–8.78 cm^–1J₃₁= 4.87 cm^–1, and Nα= 2.49 × 10^–9 m³ mol^–1 where J and J_3l refer to the exchange constants between adjacent and terminal nickel ions respectively. The second set of parameters seems intuitively more reasonable and the small z.f.s. and g value in this case can be rationalized in terms of the composition of the triplet ground state.