-Ethers Ethers have the general formula R-O-R or R-O-R' where R'is different from R These can be considered organic derivatives of water in which both hydrogens are replaced by organic groups The bond angle at oxygen is close to the tetrahedral angle R CH3 or 110O. R R CH3 Dimethyl ether General formula for an ether (a typical ether) HC CH. 0 Ethylene Tetrahydrofuran The functional group oxide (THF) of an ether Two cyclic ethers – Ethers • Ethers have the general formula R-O-R or R-O-R’ where R’ is different from R – These can be considered organic derivatives of water in which both hydrogens are replaced by organic groups – The bond angle at oxygen is close to the tetrahedral angle