Conclusions
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1.
The stability of MNI of substituted spiro[cyclopropan-1,1-indene]-2-carboxylates is increased with increasing π-system and introduction of electron acceptor substituents. The fragmentation of MNI is related to loss of substituents and is accompanied by opening of the cyclopropane ring.
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2.
The average lifetime of (M-R1,2) ions is measured relative to dissociation with elimination of a molecule of ethanol.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 576–580, March 1989.
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Mavrodiev, V.K., Furlei, I.I., Burmistrov, E.A. et al. Negative ion mass spectrometry of substituted spiro[cyclopropan-1,1-indene]-2-carboxylates and 1-alkylideneindenes. Russ Chem Bull 38, 507–511 (1989). https://doi.org/10.1007/BF00958041
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DOI: https://doi.org/10.1007/BF00958041