Dynamics of Photosubstitution Reactions of Fe(CO)5: An Ultrafast Infrared Study of High Spin Reactivity
摘要:
The photosubstitution reactions of Fe(CO)(5) with alcohols and triethylphosphine have been studied in room temperature solution using femtosecond UV pump IR probe techniques. The dynamics of Fe(CO)(5) in alcohols show that the coordination of the hydroxyl group of the solvent with tripler Fe(CO)(5) is generally much faster than the coordination timescale observed with comparable singlet species. The physical reason for this is the fact that the metal C-H agostic bond is much weaker for triplets, thus allowing fast rearrangement to the hydroxyl group of the alcohol. In the case of triethylphosphine photosubstitution- the reaction is divided into parallel channels which include intersystem crossing and a spin conserving double carbonyl loss. The intermediates observed were studied using density functional theory (DFT) as well as ah initio quantum chemical calculations.
Stereochemistry of phosphorus trihalide derivatives of iron carbonyl
作者:J.B.Ph. Tripathi、M. Bigorgne
DOI:10.1016/s0022-328x(00)83732-8
日期:1967.8
particularly from the point of vie of statellites due to 13CO-groups. It has been shown that these derivatives contain all the isomers geometrically expected for the trigonal bipyramidal structure around the iron atom. The isolation of these isomers was not possible; nevertheless, reaction mixtures containing only one isomer have been prepared.
Transition metal complexes of nitrogen-containing ligands. Part 13. Mössbauer spectra of carbonyliron complexes containing cyclic diazene ligands
作者:Max Herberhold、Konrad Leonhard、Ursel Wagner、Friedrich E. Wagner、Jaques Danon
DOI:10.1039/dt9790000654
日期:——
Room-temperature Mössbauer parameters are reported for carbonylironcomplexes of the types [Fe(CO)4L], [Fe2(CO)7L], and [Fe2(CO)6L] where L is a cyclicdiazeneligand. The data for the mononuclear [Fe(CO)4L] complexes are compared with those of organophosphane complexes of the same type.
Photolytic preparation of (benzylideneacetone)carbonylphosphineiron(0) complexes. The molecular structures of Fe(CO)2(PEt3)(bda) and Fe(CO)2(PPhMe2)(bda) (bda benzylideneacetone)
作者:Eduardo J.S. Vichi、Paul R. Raithby、Mary McPartlin
DOI:10.1016/s0022-328x(00)99303-3
日期:1983.11
excited states. The complex Fe(CO)2(PEt3(bda) crystallises in the monoclinic space group P2l/c with a 10.203(3), b 12.964(4), c 16.960(6) Å, β 120.00(2)°, and Z = 4. The structure was solved by a combination of Patterson and Fourier diffence techniques and refined by blocked full matrix least squares to R = 0.035 for 3351 unique observed diffratometer data. The complex Fe(CO)2(PPhMe2)(bda) also crystallises
(Sorbic acid) Fe(CO)2L complexes with L = CO, P(OPh)3, PPh3, and PEt3. Photolytic preparation, spectral properties, and bonding
作者:Élvio H. Santos、Edison Stein、Eduardo J.S. Vichi、Elisa B. Saitovitch
DOI:10.1016/0022-328x(89)85114-9
日期:1989.10
The (sorbic acid)Fe(CO)2L complexes, with L = CO, P(OPh)3, PPh3 and PEt3, have been prepared by irradiating the corresponding Fe(CO)4L compounds in benzene in the presence of sorbic acid. The Mössbauer spectra are compatible with the structure of a tetragonal pyramid with the iron(0) atom located in the center of the base. The values of the isomer shift, δ, seem to indicate that dπ-Lπ★ back bonding