Sugamata Koh, Asakawa Teppei, Urao Yukiko, Minoura Mao
Department of Chemistry, College of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan.
Inorg Chem. 2022 Nov 7;61(44):17641-17645. doi: 10.1021/acs.inorgchem.2c02697. Epub 2022 Oct 24.
Compounds with multiple bonds between elements of the second and fifth periods are extremely unstable, and systematic investigations into their properties remain elusive. Herein, we report a tellurium-centered heteroallene that contains multiple bonds between carbon and tellurium. This compound is the first example of bis(methylene)-λ-tellane, which was synthesized and fully characterized using multinuclear NMR spectroscopy and X-ray crystallography. In the solid state, this λ-tellane exhibits a bent allene structure for the C═Te═C moiety and unsaturated Te-C bonds. Interestingly, the allene-type structure is retained in the solution, which is reflected in an absorption band due to the π-π* transition at 610 nm. This λ-tellane also exhibits unique reactivity toward dihalogermylenes, which yielded rare cyclic telluragermetanes.
