The elusive ethenediselone, Se=C=C=Se

Carl Th Pedersen, Ming Wah Wong, Kazuo Takimiya, Pascal Gerbaux, Robert Flammang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The neutral ethenediselone, Se=C=C=Se, has been characterised by neutralisation-reionisation mass spectrometry, which implies a minimum lifetime of the order of microseconds. Tetraselenafulvalene 1 and tetramethyltetraselenafulvalene 2 were used as precursor molecules. Flash vacuum thermolysis (FVT) of these compounds with isolation of the products in Ar matrices permitted the identification of ethyne, 2-butyne, CSe2, and selenoketene, H2C=C=Se, but at best traces of Se=C=C=Se survived the FVT/matrix isolation experiment. Multiconfigurational calculations indicate that Se=C=C=Se is a ground state triplet molecule with a very small singlet-triplet gap.

Original languageEnglish
Pages (from-to)1195-1200
Number of pages6
JournalAustralian Journal of Chemistry
Issue number8-9
Publication statusPublished - 2014


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