REACTIVITY OF KETENES IN MATRICES - DIRECT OBSERVATION OF KETENE-PYRIDINE YLIDES

Authors
QIAO GGH ANDRAOS J WENTRUP C
Citation
Ggh. Qiao et al., REACTIVITY OF KETENES IN MATRICES - DIRECT OBSERVATION OF KETENE-PYRIDINE YLIDES, Journal of the American Chemical Society, 118(24), 1996, pp. 5634-5638
Citations number
44
Categorie Soggetti
Chemistry
Journal title
Journal of the American Chemical Society → ACNP
ISSN journal
00027863
Volume
118
Issue
24
Year of publication
1996
Pages
5634 - 5638
Database
ISI
SICI code
0002-7863(1996)118:24<5634:ROKIM->2.0.ZU;2-G
Abstract
Ketenes 7, 14, and 17 have been generated in pyridine matrices and obs erved by infrared spectroscopy to react with pyridine at temperatures between 15 and 50 K to form ketene-pyridine ylides 12, 15, and 18. Aza heterocyclic ketenes 20, 23, and 26 dimerize or tetramerize at ca. 50 K, whereby one ketene molecule acts as a nucleophile toward the other, forming a transient ketene-imine ylide.