Exploring Stibanyl Ligand for Accessing Arsinidene and Arsaketene Adducts, and Phosphaketene.

The salt metathesis reaction involving a diamine-based antimony chloride precursor with sodium arsaethynolate in the presence of PMe leads to the formation of stibanyl-functionalized PMe-arsinidene (). Detailed analyses through single-crystal X-ray diffraction and density functional theory of confirm the presence of covalent Sb-As bonds and reveal its polarized nature with a multiple-bond character. In contrast to the formation of complex , substituting PMe with xylyl isocyanide or 1,3-diisopropyl-4,5-dimethyl-imidazolin-2-ylidene () produces an isocyanide-arsinidene adduct () and an -arsaketene complex (), respectively. Furthermore, the related reactions of precursor with sodium phosphaethynolate yield both a stibanyl-phosphaketene () and a stibanyl-functionalized -phosphaketene adduct ().