Cobalt-mediated synthesis of angular [4]phenylene: structural characterization of a metallacyclopentadiene(alkyne) intermediate and its thermal and photochemical conversion
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[reaction: see text] The first X-ray crystal structure of a mononuclear metallacyclopentadiene(alkyne) complex has been obtained. This type of metallacycle is believed to be the key intermediate in the cobalt-mediated [2 + 2 + 2]cycloaddition of alkynes. Thermal treatment leads to the generation of angular [4]phenylene, the X-ray structural details of which are described. Under photochemical conditions, the cobaltacycle isomerizes to a highly strained (cyclobutadieno)dibenzocyclooctatrienyne complex.
Original language | English |
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Journal | Organic Letters |
Volume | 4 |
Issue number | 12 |
Pages (from-to) | 2075-8 |
Number of pages | 4 |
ISSN | 1523-7060 |
Publication status | Published - 13 Jun 2002 |
Externally published | Yes |
ID: 46282591