Aryl-substituted Triarsiranes: Synthesis and Reactivity

Cyclotriarsanes are rare and limited synthetic approaches have hampered reactivity studies on these systems. Described in here is a scalable synthetic protocol towards (AsAr)₃ (Ar = Dip, 2,6-ⁱPr₂-C₆H₃; Tip, 2,4,6-ⁱPr₃-C₆H₂), which allowed to study their reactivity towards [Cp₂Ti(C₂(SiMe₃)₂], affording titanocene diarsene complexes and towards N-heterocyclic carbenes (NHCs) to give straightforward access to a variety of NHC-arsinidene adducts. The electronic structure of the titanium diarsene complxes has been studied and they are best described as Ti(IV) species with a doubly reduced As₂Ar₂ ligand. These findings will make (AsAr)₃ valuable precursors in the synthetic inorganic and organic chemistry.