Scheme 2: Schematic representation of (a) mono- and (b-e)
bi-metallic transition metal complexes of
S2N2.
In light of our continuing research interest on the π-electron rich
inorganic aromatic compounds, we now extend our study to the ligand
property of cyclic S2N2 with mono- and
bi-metallic transition metal fragments using detailed quantum mechanical
calculations. Also note that, to the best of our knowledge, all the
experimentally reported S2N2 transition
metal complexes that are known so far contains one or more halogen
ligands in the S2N2 σ- plane (Scheme
2).[22-24] Therefore, herein we aim to provide
insight into the σ- and π-reactivity of
S2N2 as a ligand and the role of
halogens in the S2N2 transition metal
complexes. Our results might help in expanding the ligand knowledge-base
for the use of inorganic aromatic compounds in coordination chemistry.