The paddlewheel-shaped complex [Sb(μ-pyS) Rh] (1) (pyS = 2-S-C H N ) was synthesized from [Rh(pyS)(cod)] (cod=1,5-cyclooctadiene) and Sb(pyS) . Upon oxidation with ONMe , the complex [(μ-O)Sb(μ-pyS) Rh(κ -pyS)] (2) is formed. Both 1 and 2 form dimers and feature short Rh-Sb bonds and bridging pyS ligands. Sb Mössbauer spectro- scopy and computational studies were employed to elucidate the Rh-Sb bonding in 1 and 2. Both covalent (Rh-Sb, X-type Sb ligand) and dative (Rh→Sb, Z-type; Rh←Sb L-type Sb ligand) interactions have to be considered for the description of their bonding situations.
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