Artículos de revistas
MOSSBAUER-SPECTROSCOPY OF (BENZYLIDENEACETONE)FE(CO)2L COMPLEXES WITH L=CO, PHOSPHITES AND PHOSPHINES - AN ANALYSIS OF LIGAND EFFECTS
Registro en:
Journal Of Organometallic Chemistry. Elsevier Science Sa Lausanne, v. 471, n. 41671, n. 165, n. 170, 1994.
0022-328X
WOS:A1994NN48700024
10.1016/0022-328X(94)88121-9
Autor
VICHI, EJS
STEIN, E
SAITOVITCH, EB
Institución
Resumen
The (benzylideneacetone)Fe(CO)2L complexes, with L = CO, PPh3, PMePh2, PMe2Ph, PEt3, PCy3, P(OPh)3, P(OMe)3, P(OEt)3 and P(O(i)Pr)3 have been studied by Mossbauer spectroscopy. The spectra are compatible with a distorted octahedral geometry with the iron atom at the center. The isomer shifts delta and quadrupole splittings DELTAE(q) are correlated with the Giering electronic parameter chi(d) of the phosphines and phosphites and with the C-13 NMR complex shifts DELTAC4 of coordinated benzylideneacetone. The results are discussed in terms of the stereoelectronic effects of the ligand L. Correlation between isomer shifts and quadrupole splittings indicates that d(pi)-L(pi)star back bonding is predominant in the complexes with L = CO and phosphites and negligible in the complexes with L = phosphines. 471 41671 165 170