Dioxepane has three isomers: 1,2-dioxepane, 1,3-dioxepane, and 1,4-dioxepane. Identify which dioxepane could act as an ordinary ether and is excellent for Grignard reactions, which could be potentially explosive when heated, and which could quickly hydrolyze in diluted acid.

• A. (i) 1,2-dioxepane(ii) 1,3-dioxepane(iii) 1,4-dioxepane
• B. (i) 1,3-dioxepane(ii) 1,2-dioxepane(iii) 1,4-dioxepane
• C. (i) 1,4-dioxepane(ii) 1,2-dioxepane(iii) 1,3-dioxepane
• D. (i) 1,4-dioxepane(ii) 1,3-dioxepane(iii) 1,2-dioxepane

Answer: (C)