The NMR spectrum of the cyclic trimer of glycidaldehyde

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Abstract
A sample of glycidaldehyde cyclic trimer, 2,4,6‐tris(epoxyethyl)‐1,3,5‐trioxane, yielded an NMR spectrum more complex than expected. From its method of preparation, it must be a cis‐cis isomer of the chair form, with all three epoxyethyl groups equatorial. The complexity of the spectrum has been explained in terms of asymmetric carbon atoms, the sample being a racemic mixture of ddl and lld forms. A second form, with a simpler spectrum, has been identified with the ddd + lll racemate. This interpretation is believed to explain also a complex spectrum of parabutylchloral obtained by Barón and Hollis.

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