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The dinuclear nickel(II) complex [Ni 2 L(μ-ClO 4 )]ClO 4 , where L 2- represents a 24-membered macrocyclic bis(triamine-thiophenolate) ligand, reacts with 1-methyltetrazole-5-thiol and triethylamine to give the complex [Ni 2 L(μ-SCN 4 Me)]ClO 4 , which was subjected to metathesis with NaBPh 4 yielding [Ni 2 L(μ-SCN 4 Me)]BPh 4 . This new complex was characterized by elemental analysis, UV/Vis/NIR and IR spectroscopy. The structure of [Ni 2 L(μ-SCN 4 Me)]BPh 4 was determined by X-ray crystallography, showing the 1-methyltetrazole-5-thiolate ligand in an N(3),N(4)-bridging mode generating a bis(octahedral) N 3 Ni(μ-S) 2 (μ-SCN 4 Me)NiN 3 core. Quantum chemical calculations of the molecular electrostatic potential, natural population analysis and total energies of possible structures of [Ni 2 L(μ-SCN 4 Me)] + are in agreement with the structural data obtained. Temperature-dependent magnetic susceptibility measurements revealed that the Ni II ions in the dinuclear complex are weakly ferromagnetically coupled showing a coupling constant J of 19.5 cm -1 (H = -2JS 1 S 2 ).