New Synthetic Routes to a Disulfidodinickel(II) Complex: Characterization and Reactivity of a Ni<sub>2</sub>(µ-η<sup>2</sup>:η<sup>2</sup>-S<sub>2</sub>) Core ChoJaeheung M. Van HeuvelenKatherine P. A. YapGlenn BrunoldThomas C. RiordanCharles G. 2008 Activation of elemental sulfur by the monovalent nickel complex [PhTt<sup>tBu</sup>]Ni(CO) [PhTt<sup>tBu</sup> = phenyl{tris[(<i>tert</i>-butylmethyl)thio]methyl}borate] generates the disulfidodinickel(II) complex <b>2</b>. This species is alternatively accessible via thermal decomposition of [PhTt<sup>tBu</sup>]Ni(SCPh<sub>3</sub>). Spectroscopic, magnetic, and X-ray diffraction studies establish that <b>2</b> contains a µ-η<sup>2</sup>:η<sup>2</sup>-S<sub>2</sub> ligand that fosters antiferromagnetic exchange coupling between the Ni<sup>II</sup> ions. This observation is in contrast to the lighter congener, oxygen, which strongly favors the bis(µ-oxo)dinickel(III) structure. <b>2</b> oxidizes PPh<sub>3</sub> to SPPh<sub>3</sub> and reacts with O<sub>2</sub>, generating several products, one of which has been identified as [(PhTt<sup>tBu</sup>)Ni]<sub>2</sub>(µ-S) (<b>3</b>).