A question about H-bond

Each oxygen atom in ether molecule has two lone pairs of electrons, and thus it can form a hydrogen bond with a hydrogen atom in water molecule. However, since two bulky alkyl groups are attached to the oxygen atom in ether molecule, thus the hydrogen bonds between ether and water molecule are more difficult to form than the hydrogen bonds between water molecules. Therefore, ether is only slightly soluble in water. For example, the solubility of diethyl ether (CH3CH2OCH2CH­3) is 6.9 g per 100 g of water.

在醚分子中每個氧原子都有兩對孤電子對，故可與水分子中的氫原子形成氫鍵。可是，由於醚分子中的氧原子連接著兩個體積較大的烴基，故與水分子間的氫鍵比較，醚分子與水分子間的氫鍵較難形成。因此，醚只微溶於水。例如，乙醚 (CH3CH2OCH2CH­3) 的在 100 g 水中的溶解度是 6.9 g。