three-membered


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Adj.1.three-membered - of a chemical compound having a ring with three membersthree-membered - of a chemical compound having a ring with three members
membered - having members; normally used in chemistry in combination with a number
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The chapters are not comprehensive reviews, but personal accounts, and cover 1,2-migrations, 1,2-migrations via three-membered rings, 1,3-transpositions, [3,3]-and [2,3]-sigmatropic rearrangements, and IPSO rearrangements.
Unprecedented ring-enlargements to four-membered rings by 3+1 -cycloadditions employing isonitriles, carbenes and nitrenes are envisioned, aryne insertions into the three-membered ring leading to indane systems are planned and a general concept for 3+3 -cycloadditions with 1,3-dipoles is presented paving the way to unusual syntheses of heterocycles.
A general-purpose epoxy polymer consists of a three-membered epoxy ring formed by the reaction of bisphenol A and epichlorohydrin.