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The ligand 1,8-naphthyridine (napy) exhibits a rich coordination chemistry arising from the disposition of its two nitrogen atoms. In this work, the mononuclear platinum complex cis-[Pt(C6F5)2(napy)2] was synthesized and used to prepare other platinum complexes such as cis-[Pt(C6F5)Cl(napy)2]. More importantly, its suitability as precursor for the synthesis of other heterobimetallic donor-acceptor complexes of the type Pt → M (M = Ag, Cu) was explored. This way, complexes cis-[Pt(C6F5)2(μ-napy)2Ag(OClO3)] and cis-[Pt(C6F5)2(μ-napy)2Cu(NCMe)][PF6] were prepared, in which two napy ligands bridge both metal atoms. In the rare Pt → Cu donor-acceptor complex, the MeCN ligand was easily substituted by a chlorido ligand, resulting in cis-[Pt(C6F5)2(μ-napy)2CuCl] and [{Pt(C6F5)2(μ-napy)2Cu}2(μ-Cl)][PF6], depending on the stoichiometry. In all cases, the free rotation of the C6F5 ligands about the Pt-C bonds in solution at room temperature can be stopped at low temperature.
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