X-ray structures of 3-acetyloxazolidin-2-one, 3-acetyloxazolin-2-one and oxazolin-2(3H)-one
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The X-ray structures of three simple heterocyclic compounds have been obtained for the first time. Structures of both 3-acetyloxazolidin-2-one 1 and its unsaturated analogue 3-acetyloxazolin-2-one 3 show a planar imide nitrogen with the exocyclic C=O oriented anti to the ring N–C(=O) bond and negligible intermolecular interactions, a pattern consistent with previously reported analogues. In contrast the parent NH heterocycle, oxazolin-2(3H)-one 4 , exists as hydrogen bonded dimers of two closely similar independent molecules but an unusual type of disorder involving exchange of the ring O and NH positions results in a very high R factor.
Aitken , R A , Logan , J S & Slawin , A M Z 2022 , ' X-ray structures of 3-acetyloxazolidin-2-one, 3-acetyloxazolin-2-one and oxazolin-2(3 H )-one ' , Molbank , vol. 2022 , no. 3 , M1445 . https://doi.org/10.3390/M1445
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