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8712860 
Journal Article 
Comparative study of the electron impact decomposition of 5,5,9-trimethyl-1-oxaspiro[4.5]decan-2-one and 5,5,9-trimethyl-1-oxabicyclo[4.4]decan-2-one 
Kadentsev, VI; Maksimova, BI; Chizhov, OS; Yanovskaya, LA 
1989 
1 
Bulletin of the Academy of Sciences of the USSR. Division of Chemical Science
ISSN: 0568-5230 
38 
4 
874-876 
English 
1. The γ-lactone is more stable than the δ-lactone both relative to electron impact and upon chemical ionization. 2. The major pathways for fragmentation upon electron impact for the γ-lactone are related to decomposition of the cyclohexane ring, while, in the case of δ-lactone, fragmentation of the oxygen-containing part of the molecule also occurs in addition to these processes. 1989 Plenum Publishing Corporation.