Abstract
AbstractThe magnetic properties of the dinuclear and tetranuclear nickel(II) tetrazolato complexes [Ni2L(RCN4)][BPh4] (R = H (4), Me (5), Ph (6)) and [(Ni2L)2(1,4‐(CN4)2‐C6H4)][BPh4]2 (7), where (L)2– represents a 24‐membered macrocyclic N6S2 supporting ligand, are reported. Analysis of temperature‐dependent magnetic susceptibility measurements over the temperature range from 2 to 300 K revealed the presence of weak ferromagnetic exchange interactions between the NiII ions in the binuclear [Ni2L(μ‐L′)]+ subunits with magnetic exchange coupling constant values of J1 = 13.5 cm–1 for 4, J1 = 20.0 cm–1 for 5, J1 = 19.2 cm–1 for 6, and J1 = 15.2 cm–1 for 7 (H = –2JS1S2). The exchange coupling J2 across the bistetrazolato bridge in 7 is less than 0.1 cm–1, which suggests that no significant interdimer coupling occurs in this compound. The synthesis and crystal structure of the new complex 7·2MeCN is also reported.
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