Description:
<jats:title>Abstract</jats:title>
<jats:p>Cu<jats:sup>II</jats:sup> and Au<jats:sup>III</jats:sup> chlorido complexes bearing the bis(NHC) carbazolide pincer ligand (bimca) were synthesized by transmetallation from the respective lithium complex [Li(bimca)] (NHC=N-heterocyclic carbene). In the case of copper, two different molecular structures were obtained depending on the copper source. With Cu(II) chloride the paramagnetic mononuclear [Cu(bimca)Cl] complex is formed and has been characterized by EPR spectroscopy and X-ray structure analysis, while copper(I) chloride leads under oxidation to a dinuclear structure in which two cationic [Cu<jats:sup>II</jats:sup>(bimca)] moieties are bridged by one chlorido ligand. The positive charge is compensated by the [CuCl<jats:sub>2</jats:sub>]<jats:sup>−</jats:sup> counter ion, as proven by X-ray structure analysis. Transmetallation of [Li(bimca)] with AuCl<jats:sub>3</jats:sub> leads to the [Au(bimca)Cl]<jats:sup>+</jats:sup> complex with a tetrachloridoaurate counter ion.</jats:p>