Ethers and Epoxides
Ethers and Epoxides By Dr. Mohammad
Ethers are a class of compound of the general formula R-O-R’.
R and R’ can be alkyl or aryl.
Structure
Ethers can be thought of as alkyl analogues of water.
Uses
Since ethers are relatively unreactive and are somewhat polar (due to the lone pairs on the oxygen), they are commonly used as solvents for organic reactions. (Diethyl ether and THF, the Grignard reaction).
Ethers will often form complexes with molecules that have vacant orbitals, enabling ‘unstable’ molecules to be used as reagents.
E.g. Hydroboration uses BH3.THF
Crown ethers are macrocyclic ethers, which help to solvate metal cations, and thus allow inorganic salts to dissolve in organic solvents.
18-Crown-6 is the ideal size to incorporate a potassium ion, and allows organic solutions of ionic potassium salts to be prepared (purple benzene, KMnO4).
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .