Silaaziridines from the reaction of isonitriles with stable silenes

Stable silenes of the family (Me 3 Si) 2 Si=C-(OSiMe 3 )R react with isonitriles R'N=C: to yield unstable silacyclopropanimines which rapidly rearrange below room temperature to form the isomeric silaaziridines, as shown by the crystal structure of one of the compounds (R=Ad, R'=t-Bu). These are the first reported examples of three-membered rings containing both silicon and nitrogen