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Cobalt-mediated synthesis of angular [4]phenylene: structural characterization of a metallacyclopentadiene(alkyne) intermediate and its thermal and photochemical conversion

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  • Peter I Dosa
  • Glenn D Whitener
  • K Peter C Vollhardt
  • Andrew D Bond
  • Simon J Teat
[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.
OriginalsprogEngelsk
TidsskriftOrganic Letters
Vol/bind4
Udgave nummer12
Sider (fra-til)2075-8
Antal sider4
ISSN1523-7060
StatusUdgivet - 13 jun. 2002
Eksternt udgivetJa

ID: 46282591