1.2.4- Trioxolanes electron diffraction

Table 2 Structural parameters and conformations of 1,2,4-trioxolane rings obtained from x-ray diffraction compared with data for 1,2,4-trioxolane from electron diffraction. ...

TABLE 5. Comparison of the structural parameters of gaseous 1,2,4-trioxolane determined by microwave spectroscopy and electron diffraction ... 

Electron diffraction measurements of gaseous 1,2,4-trioxolane point to either a C2 symmetry, as depicted at the bottom of Appendix A, or a Cj symmetry, corresponding to an envelope conformation. However, consideration of steric interactions favors the twisted chair conformation (288c) for the molecule. Table 5 presents the structural parameters derived from electron diffraction, assuming that both C—O distances are equal and that the H atoms are symmetrically placed with respect of the neighboring atoms. Assumptions on the vibrational amplitudes of the ring bonds do not affect the calculated values of Table 5, except for the H—C—H angle . ... 

Electron-deficient olefins, asymmetric epoxidation, 386-91 Electron diffraction dialkyl peroxides, 713 ozonides, 721, 723 1,2,4-trioxolanes, 740 see also Gas electron diffraction Electron-donating substituents ene reactions, 841 sulfonyl peroxides, 1005-7 Electronegative functional groups,... 

Table 1 Structural Parameters of Derivatives of 1,2,4-Trioxolane, 1,2,4-Trithiolane and l,3>2-Dioxathiolane Obtained by Electron or X-Ray Diffraction... 

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