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■ Structural Determination of the Ozonides Derived from Mono-substituted Alkenes

Yung-Son Hon,* Ling Lu, Rong-Chi Chang, and Kuan-Po Chu

*Institutue of Chemistry, Academia Sinica, 128, Yan-Chiu-Yuan Road, Sec II, Nankang, Taipei,11529, Taiwan, R.O.C.

Abstract

The structures of 1,2,4-trioxolanes (ozonides) (2a-2f) derived from mono-substituted alkenes (1a-1f), respectively, were determined by spectroscopic methods, such as ¹H-nmr, ¹³C-nmr, ir, two-dimensional nmr, and mass spectra. The coupling constant of the geminal protones on the trioxolane ring is zero. This unusual coupling constant resulted from the electronegatively of two oxygen atoms near the geminal protons.