N-Methyl-1,3,5,2-trioxazinane (or N-methyl-2,4,6-trioxapiperidine), by
analogy with s-trioxane, should decompose thermally into MeNO + 2CH(2
)O; this substance does not appear to have been made, but molecular or
bital calculations show that it should be almost as stable as s-trioxa
ne.