Functionalized 3H-1,2,3,4-triazaphosphole derivatives: Synthesis and structural characterization of novel low-coordinate phosphorus heterocycles

Clicking the Arsenic–Carbon Triple Bond: An Entry into a New Class of Arsenic Heterocycles

“…[16] In Figure 4 it can be noted that the replacement of a phosphorus atom by an arsenic atom in an otherwise identical structure leads to a significantly smaller N-As-C angle of 81.48 compared to an N-P-C angle of approximately 86.48 in triazaphospholes. [16] In Figure 4 it can be noted that the replacement of a phosphorus atom by an arsenic atom in an otherwise identical structure leads to a significantly smaller N-As-C angle of 81.48 compared to an N-P-C angle of approximately 86.48 in triazaphospholes.…”

“…The single-crystal X-ray diffraction analysis of the first triazaarsole further allows a comparison of the structural parameters of 4 with the known ones of triazaphospholes. [16] In Figure 4 it can be noted that the replacement of a phosphorus atom by an arsenic atom in an otherwise identical structure leads to a significantly smaller N-As-C angle of 81.48 compared to an N-P-C angle of approximately 86.48 in triazaphospholes. This effect is mainly due to the substantially longer AsÀC (and AsÀN) bond compared to a PÀC or PÀN bond.…”

Klick‐Reaktion an der Arsen‐Kohlenstoff‐Dreifachbindung: Zugang zu einer neuen Klasse arsenhaltiger Heterocyclen

“…[14] Anschließend wurde 1 mit 2-(Azidomethyl)pyridin ( 3 Die Einkristallrçntgenstrukturanalyse des ersten Triazaarsols ermçglicht ferner den Vergleich der Strukturparameter von 4 mit denen von bekannten Triazaphospholen. [16] In Abbildung 4 ist verdeutlicht, dass der Austausch des Phosphoratoms gegen ein Arsenatom in der ansonsten identischen 4): 1.320( 4), N(4)-C( 7): 1.353 (5). C( 7)-As(1)-N( 2): 81.40( 14).…”