Compound 3

1,3-Bis[2,6-bis(1-methylethyl)phenyl]-2-[1,3-dihydro-4,5-dimethyl-1,3-bis(1-methylethyl)-2H-imidazol-2-ylidene]-4-methyl-6-methylene-3,4-dihydro-1H-[1,3,2]diazasiline 2-oxide

From: From silicon(II)-based dioxygen activation to adducts of elusive dioxasiliranes and sila-ureas stable at room temperature