Hey, How would I name (IUPAC) the isomer of C2H4O that is a triangular ring with C at two vertices and O at the third? Also, I'm trying to name the 11 isomers of C3H6O. So far I have 10 and I can't seem to get the last one. The ones I have are: propanal propan-2-one prop-2-en-1-ol prop-1-en-2-ol (Z)-prop-1-en-1-ol (E)-prop-1-en-1-ol methoxyethene cyclopropanol and two rings like the one I described above with O at a vertex I hope those names are right but please tell me if they don't make sense and I'll try another one. Any help will be really appreciated. Thanks!