Structures of fundamental organic peroxides such as 1,2,4-trioxolanes , peracetic acid2, and dioxirane3 have been well established by microwave spectroscopy. 3,6-Dihydro-1,2-dioxins (1,4-endoperoxides) are also fascinating peroxides which are easily obtained by the reaction of 1,3-dienes with single
Microwave spectrum and structure of 3,6-dihydro-1,2-dioxin
✍ Scribed by Mitsutoshi Tanimoto; Toshihiko Kondo
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 447 KB
- Volume
- 323
- Category
- Article
- ISSN
- 0022-2860
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## Abstract Optimized geometries and total energies for the conformers of 3,6‐dihydro‐1,2‐dithiin (2) and 3,6‐dihydro‐1,2‐dioxin (3) were calculated at several __ab initio__ MO levels: RHF/3‐21G(\*), RHF/6‐31G\*, MP2/6‐31G\*, and MP2/6‐31G\*/ /RHF/3‐21G(\*). For the dioxin, in addition to the above
The six-membered ring in the title compound, C~10~H~17~NO~4~, has a half-chair conformation and lies to one side of the central chromophore. Molecules are connected into a supramolecular chain __via__ N—H...O hydrogen-bonding interactions and these are consolidated into a three-dimensional structure
## Abstract A new construction of dihydro‐1,4‐dioxin and a synthesis of 5,6‐dihydro‐2‐trifluoromethyl‐1,4‐dioxin‐3‐carboxanilides **22** through polymer‐bound activated ester are described. An intermediate β‐hydroxy ether **18** was prepared from the substitution reaction of α‐thio‐α‐chloro compoun