N-heterocyclic thione (NHT) and selone (NHSe) ligands have an extensive coordination chemistry as soft analogues of the widely popular N-heterocyclic carbenes (NHCs) and also as versatile building blocks in a variety of other sulfur- and selenium donor ligands such as the poly(mercaptoimidazolyl)borates. We started a couple of years ago a systematic study of new NHT and NHSe ligands that feature sterically-demanding substituents on the nitrogen atoms, and this presentation will describe the effects of ring size and backbone saturation on both the reactivity of such ligands and the molecular structures of the metal complexes they support. More specifically, the synthesis and coordination chemistry of 5- and 6-membered chalcogenones (abbreviated SIArE and SpymArE, respectively, where E = S or Se) will be described in this presentation, including the isolation and molecular structures of several complexes of copper(I), gold(I) and mercury(II).

Synthesis and reactivity of N-heterocyclic thiones and selones with saturated backbones

254th National Meeting (2017)

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