Halogenation, sulfonation, nitration, or nitrosation of ethers, ether alcohols, and ether phenols involve the introduction of halogens, sulfonic acid groups, nitrates, or nitrosamines to the ether-based structures. Halogenation enhances the reactivity and stability of these compounds. Sulfonation adds water solubility and acidity. Nitration and nitrosation introduce nitro and nitrosamine functional groups, respectively. These modified ethers and ether derivatives offer tailored properties, opening new avenues for applications in research, materials science, and the development of specialized chemicals.