# Some questions about naming conventions for ethers

1. Oct 14, 2009

### espen180

First, I am wondering about naming conventions for cyclic ethers.

I have found
$$C_2O$$ : Ethylene oxide
$$C_4O$$ : Tetrahydrofuran

But (I think) these are trivial names.

I think I found a system where for example a cycle of three O-atoms and three C-atoms in C-O-C-O... fashion becomes 1,3,5-trioxycyclohexane.

Also, in compounds, we count from the O-atom closest to the bond between the compounds, like in 2,3-benzo-1,3-dioxycycloheptane?

Can anyone confirm this, eventually contribute additional useful rules related to this?