The Si-C bond in 1-organylsilatranes is cleaved by bromine or iodine c
hloride to yield 1-bromo- or 1-chlorosilatrane respectively. In the pr
esence of Et(2)O or THF and under the action of dioxane dibromide, 1-h
alosilatranes are formed together with 1-alkoxy- and 1-(omega-haloalko
xy)silatranes.