CHM138H1 Chapter all: Ethers and Epoxides Thiols and Sulfides
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CHM136H1 Full Course Notes
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Document Summary
Ethers are compounds with an oxygen bonded to two r groups (alkyl, aryl, or vinyl). For the common names of unsymmetrical ethers (two different r groups), each r group is identified, then arranged in alpha(cid:271)eti(cid:272)al order, the(cid:374) add the word (cid:862)ether(cid:863) (cid:894)e(cid:454)a(cid:373)ple, Symmetrical ethers (two same r groups) are named as dialkyl ether (ch3ch2och2ch3 is diethyl ether). For systematic naming, the larger group is the parent alkane and the smaller group is an alkoxy substituent (ch3ch2och2ch2ch2ch2ch3 is ethoxypentane). The oxygen is sp3-hybridized, and are arranged in nearly tetrahedral shape. Ethers have largest bond angles compared to h2o and alcohols. Ethers have lower boiling points than their isomeric alcohols because of the absence intermolecular hydrogen bonding. Because of the net dipole moment, their boiling points are higher than alkanes of similar size. The larger the alkyl groups on the ether, the higher the boiling point due to london dispersion forces.
