Cyclotriarsanes are rare and limited synthetic
approaches have hampered reactivity studies on these systems. Described in here
is a scalable synthetic protocol towards (AsAr)<sub>3</sub>
(Ar = Dip, 2,6-<sup>i</sup>Pr<sub>2</sub>-C<sub>6</sub>H<sub>3</sub>;
Tip, 2,4,6-<sup>i</sup>Pr<sub>3</sub>-C<sub>6</sub>H<sub>2</sub>), which
allowed to study their reactivity towards [Cp<sub>2</sub>Ti(C<sub>2</sub>(SiMe<sub>3</sub>)<sub>2</sub>],
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 As<sub>2</sub>Ar<sub>2</sub>
ligand. These findings will make (AsAr)<sub>3</sub> valuable precursors in the
synthetic inorganic and organic chemistry.
