Studies on the Polymerization of Acrolein Oxime. XIV. The Structure of 2,4,7-Trimethylperhydroisoxazolo[2,3-a]pyridine-2,7-dicarbaldehyde Dioxime

doi:10.1246/BCSJ.53.3240

Paper

Studies on the Polymerization of Acrolein Oxime. XIV. The Structure of 2,4,7-Trimethylperhydroisoxazolo[2,3-a]pyridine-2,7-dicarbaldehyde Dioxime

Published Nov 1, 1980 · T. Ota, S. Masuda, M. Kido

Bulletin of the Chemical Society of Japan

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6

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Abstract

The thermal oligomerization of methacrylaldehyde oxime leads preferentially to two 2,4,7-trimethylperhydroisoxazolo[2,3-a]pyridine-2,7-dicarbaldehyde dioximes, which are comformationally isomeric with each other. The crystal structure of the α-form has been determined by means of X-ray diffraction. It is monoclinic, with the space group P21/a. The cell dimensions are a=7.858(3), b=13.186(6), c=17.259(6) A, β=130.38(3)°, and Z=4. The molecules are linked by OH···O and OH···N intermolecular hydrogen bonds, with the O···O and O···N distances of 2.794(6) and 2.760(5) A respectively. Since attempts of the crystallization of the β-form have been unsuccessful, the determination of its chemical structure was attempted by means of 13C-NMR spectroscopy and gas chromatography-mass spectrometry. The β-form is, at any rate, different from the α-form.

Study Snapshot

The crystal structure of the -form of 2,4,7-trimethylperhydroisoxazolo[2,3-a]pyridine-2,7-dicarbaldehyde dioxime shows that it is monoclinic, with the space group P21/a, and the -form

PopulationOlder adults (50-71 years)

Sample size24

MethodsObservational

OutcomesBody Mass Index projections

ResultsSocial networks mitigate obesity in older groups.

Studies on the Polymerization of Acrolein Oxime. XIV. The Structure of 2,4,7-Trimethylperhydroisoxazolo[2,3-a]pyridine-2,7-dicarbaldehyde Dioxime

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