Synthesis of new donor/acceptor eta(5)-cyclopentadienyl and eta(5)-indenyliron(II) complexes with p-benzonitrile derivatives. Crystal structures of [Fe(eta(5)-C5H5)(CO)(P(OC6H5)(3))(p-NCC6H4NO2)][BF4]center dot CH2Cl2 and [Fe(eta(5)-C9H7)(CO)(P(OC6H5)(3))(p-NCC6H4NO2)][BF4]
Mh. Garcia et al., Synthesis of new donor/acceptor eta(5)-cyclopentadienyl and eta(5)-indenyliron(II) complexes with p-benzonitrile derivatives. Crystal structures of [Fe(eta(5)-C5H5)(CO)(P(OC6H5)(3))(p-NCC6H4NO2)][BF4]center dot CH2Cl2 and [Fe(eta(5)-C9H7)(CO)(P(OC6H5)(3))(p-NCC6H4NO2)][BF4], J ORGMET CH, 632(1-2), 2001, pp. 145-156
New complexes of the type [Fe(eta (5)-Cp or Ind)(L)(L ')(p -NCR)][BF4] (L,
L ' = CO, P(OC6H5)(3), P(CH5)(3); R = C6H4N(CH3)(2). C6H4NO2, (E)-C(H)=C(H)
C6H4NO2, (E)-C(H)=C(H)C6H4N(CH3)(2)) have been synthesised and characterise
d. Spectroscopic data were analysed in order to evaluate the tuning of the
electronic density at the metal centre and the extension of the pi -delocal
isation on the molecule, due to the presence of coligands with different ac
ceptor/donor abilities. The structures of two complexes [Fe(eta (5)-C5H5)(C
O)(P(OC6H5)(3))(P-NCC6H4NO2)][BF4] and [Fe(eta (5)-C9H7)(CO)(P(OC6H5)(3))(P
-NCC6H4NO2)][BF4] were determined by X-ray crystallographic analysis. The c
ompounds crystallised in the centrosymmetric space groups P (1) over bar an
d P2(1)/n, respectively. Bond distances within the nitrile ligand are discu
ssed in order to evaluate the nature of iron-nitrile bonding in these compl
exes. (C) 2001 Elsevier Science B.V. All rights reserved.