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The symmetric binuclear iron mu-bis(ethylidene) complex [Cp(dppe)Fe(=
CHCH2CH2CH=)Fe(dppe)Cp][PF6](2) (2) reacts with the equivalent of two
KOBut in THF to provide the mononuclear eta(1)-butadienyl complex Cp
(dppe)Fe(CH=CH-CH=CH2) (4) isolated in 76% yield. (C) 1998 Elsevier Sc
ience S.A. All rights reserved.