REACTIVITY OF 1-SUBSTITUTED (PENTADIENYL) IRON(1- REGIOSELECTIVITY FOR ADDITION OF MALONATE NUCLEOPHILES - FORMATION OF (PENTENEDIYL)IRON AND (DIENE)IRON COMPLEXES() CATIONS )
Wa. Donaldson et al., REACTIVITY OF 1-SUBSTITUTED (PENTADIENYL) IRON(1- REGIOSELECTIVITY FOR ADDITION OF MALONATE NUCLEOPHILES - FORMATION OF (PENTENEDIYL)IRON AND (DIENE)IRON COMPLEXES() CATIONS ), Journal of organometallic chemistry, 539(1-2), 1997, pp. 87-98
The reaction of six 1-substituted (pentadienyl)iron cations (1-6) with
malonate anions was examined. The electronic nature of substituents p
resent on the pentadienyl ligand, the steric bulk of the malonate anio
n, and the peripheral Ligands about the iron metal were varied. (Pente
nediyl)- and/or (diene)iron complexes, resulting from attack at either
an internal (C2/C4) or terminal (C1/C5) pentadienyl carbon, were isol
ated as products. These results indicate that strongly electron withdr
awing substituents direct malonate attack at the internal pentadienyl
site, while strongly electron donating substituents direct malonate at
tack at the terminal pentadienyl site. The single crystal X-ray diffra
ction analysis of two (pentenediyl)iron complexes (7a and 7b) are repo
rted. (C) 1997 Elsevier Science S.A.