The title compound 2 contains the first SiO2 three-membered ring. 2 is formed upon thermal reaction of dimethylsilanediyl 1 with molecular oxygen in an argon matrix. The IR bands were assigned by isotopic labeling and comparison with the results of ab initio calculations. Upon irradiation with visible light, 2 rearranges into the sila ester 3; thus, 2 behaves like its carbon analogues.
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Patyk et al. (1989) studied this question.
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