REARRANGEMENT INHIBITOR

To provide a rearrangement inhibitor that inhibits the rearrangement of a fluorine-containing cyclic ether compound such as hexafluoropropylene oxide.SOLUTION: The present invention provides an inhibitor for the rearrangement of a compound, represented by formula (1) containing a compound represented by formula (2) [R, Rand Rindependently represent H, F, Cl or (halo) fluoroalkyl group, where, they may not represent F at the same time; n1 is 0 or 1]. [L is methylene, ethane-1,1-diyl or ethane-1,2-diyl; one or two of R, R, Rand Rindependently represent C-Calkyl group, the remainder being H].SELECTED DRAWING: None 【課題】ヘキサフルオロプロピレンオキシド等の含フッ素環状エーテル化合物の転位を抑制する転位防止剤の提供。【解決手段】式（２）で表す化合物を含む式（１）で表される、化合物の転位防止剤。［Ｒ１ａ、Ｒ１ｂ及びＲ１ｃは各々独立にＨ、Ｆ、Ｃｌ又は（ハロ）フルオロアルキル基、但し、同時にＦはない；ｎ１は０又は１］［Ｌはメチレン、エタン−１，１−ジイル又はエタン−１，２−ジイル；Ｒ２ａ、Ｒ２ｂ、Ｒ２ｃ及びＲ２ｄの内の１又は２個は各々独立にＣ１−Ｃ４アルキル基、残りはＨ］【選択図】なし