The Reaction of Tetramesityldisilene with As4: Synthesis and Structure of a Novel Arsenic–Silicon Tricyclic Ring System

An As2Si2, an AsSi2, and an As3 ring are all found in the tricyclic compound 1, which is accessible from Mes2SiSiMes2 (Mes = 2,4,6-trimethylphenyl) and As4. A second product, a diarsadisilabicyclo[1.1.0]butane derivative with a butterfly structure, can also be obtained by heating 1.