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The First Carbonyl Iron Complexes with Dihydroacepentalene Ligands by Holger Butenschön; Armin de Meijere is a Chemistry article available to read on EtoBox.

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Akract-l,QDibromo-(8) as well as 1,4,7-wichloro-(11s) and 1,4,7-tri&romotriquinacene(llb) rc~ct with Fe#O), in THF to yield (dihydroacepentakne)hexacnrbonyldiiron complexes 9 and 10, the first rcprescnt.ativcs with a 7, lO-dib~tals lig8nd. By rca&on with Fc~(CG)~ the readily accnsibb 4,7-b~dialkylaminn)tri~c~[5.2.l,~\*\*~-t(lO~,~~~~~ 14, darivativcp of the unknown 4,7dihydroaccpentalcnc, were transformadinto t.h& trkarbonylironcomplcxes 15. Upon reduction with aodium in~F,thcrf\*~dicne)tricarbonyliron iSeeladivelygave thenovel l,l~2~ol&#rkarboonylkrratu( -2)17a3 a rwuIt of a twofold cktron tmnsk. The intermediate green radical anion 16, which ia persistent in the abscnot of excess sodium, WM c&act&A by its ESR signal. Complex~ 17 are the firat of their class with complete structural characterizatiti by 'H-and 'SC-Nh!R spectrmpy. While pentalenc ( ) is a known mokculc, al&t a highly lX?XtiVC metal, as has successfully been used to stabike many dimerize, P olyolcfin with an cxtrane tendency to elusive dicnca and polyenes.\* Indeed\_ actptntakno no reports have appeared as yet on attempted or even successful, generation of the ethcno-

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Author

Holger Butenschön; Armin de Meijere

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0040-4020)

Published

1986

Language

EN

Field

Chemistry (Physical Sciences)