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The paddlewheel‐shaped complex [Sb(μ‐pyS)4Rh]2 (1) (pyS−= 2‐S‐C5H4N−) was synthesized from [Rh(pyS)(cod)]2 (cod=1,5‐cyclooctadiene) and Sb(pyS)3. Upon oxidation with ONMe3, the complex [(μ‐O)Sb(μ‐pyS)3Rh(κ2‐pyS)]2 (2) is formed. Both 1 and 2 form dimers and feature short Rh−Sb bonds and bridging pyS ligands. 121Sb 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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Wächtler et al. (2017) studied this question.
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