56700-29-9Relevant academic research and scientific papers
Synthesis and multinuclear magnetic resonance study of stereochemically nonrigid derivatives of iron pentacarbonyl containing bidentate ligands
Langford, G. Robert,Akhtar, Masud,Ellis, Paul D.,MacDiarmid, Alan G.,Odom, Jerome D.
, p. 2937 - 2941 (1975)
In order to examine the stereochemical behavior of iron tricarbonyl derivatives of several bidentate ligands a multinuclear NMR investigation was carried out on the following ligands and corresponding iron tricarbonyl derivatives: (CH3)2P-CF2CH2P(CH3) 2, Fe[(CH3)2PCF2CH2P(CH 3)2](CO)3, (CeHs)2P(CH2)JP(CeHs)2, Fe[(C6H5)2P(CH2)3P(C 6H5)2](CO)3, o-C6H4(As(CH3)2)2 (diars), and Fe(diars)(CO)3. Nuclei studied include 1H, 19F, 31P, and 13C. Results indicate stereochemical nonrigidity on the NMR time scale down to -70°C for all the complexes studied. Because of evidence showing the structure of Fe(diars)(CO)3 to be close to idealized trigonal bipyramidal, this complex was further investigated and found to be stereochemically nonrigid on the NMR time scale down to -140°C.
Microwave synthesis of benchmark organo-iron complexes
Garringer, Sean M.,Hesse, Andrew J.,Magers, John R.,Pugh, Kristapher R.,O'Reilly, Stacy A.,Wilson, Anne M.
, p. 6841 - 6844 (2010/04/01)
Microwave-assisted reaction techniques have been applied to the formation of a variety of organo-iron species. The species synthesized include ferrocene and acetyferrocene, piano stool complexes such as CpFe(CO)2I, CpFe(PPh3)(CO)I, a
Enthalpies of reaction of (diene)- and (enone)iron tricarbonyl complexes with monodentate and bidentate ligands. Solution thermochemical study of ligand substitution in the L2Fe(CO)3 complexes
Luo, Lubin,Nolan, Steven P.
, p. 2410 - 2415 (2008/10/08)
The enthalpies of reaction of (BDA)Fe(CO)3 (BDA = (C6H5)CH=CHO(CH3), benzylideneacetone) with a series of mono- and multidentate ligands, leading to the formation of (η4-L)Fe(CO)3, (L′)2Fe(CO)3, and (L″)Fe(CO)3 complexes (L = diene, enone; L′ = monodentate arsines; L″ = bidentate ligands), have been measured by solution calorimetry in THF at 50°C. The range of reaction enthalpies spans some 44 kcal/mol. The overall relative order of stability established is as follows: for monodetate ligands, AsPh3 3 a relative order of complex stability for these compounds in the iron tricarbonyl system. These data allow the calculation of the enthalpy associated with the geometric isomerization process (axial-equatorial/ diaxial) present in the (L′)2Fe(CO)3 system (5.4 ± 0.5 kcal/mol) as well as for a quantitative analysis of ring strain energies in the (L″)Fe(CO)3 system. The four-membered metallacycle is the only cyclic structure exhibiting significant strain energy (12.6 kcal/mol). Comparisons with other organometallic systems and insight into factors influencing the Fe-L bond disruption enthalpies are also discussed.
Calorimetric studies of the heats of protonation of the metal in Fe(CO)3(bidentate phosphine, arsine) complexes: Effects of chelate ligands on metal basicity
Sowa Jr., John R.,Zanotti, Valerio,Facchin, Giacomo,Angelici, Robert J.
, p. 160 - 165 (2007/10/02)
Titration calorimetry has been used to determine the beats of protonation (ΔHHM) of Fe(CO)3(LL) complexes (LL = dppm, dppe, dppp, dppb, dppbz, cis-dppv, arphos, dmpm, dcpe, and diars) with CF3SO3H in 1,2-dichlor
REDUCTIVE CARBONYLATION OF IRON(II) WITH MANGANESE METAL. PREPARATION OF CARBONYL DIPHOSPINE COMPLEXES OF IRON(0)
Battaglia, Luigi Pietro,Chiusoli, Gian Paolo,Delledonne, Daniele,Nardelli, Mario,Pelizzi, Corrado,Predieri, Giovanni
, p. 345 - 348 (2007/10/02)
A slective one-step method is reported for the synthesis of Fe(CO)3(P-P) derivatives (P-P = chelating tertiary diphosphine), starting from FeCl2, diphosphine and manganese, in tetrahydrofuran, under a CO atmosphere, at room temperature.The use of manganese metal as reducing agent is essential for the selectivity of the process.In the absence of the reducing agent, complexes of the type Fe(CO)2(P-P)Cl2 have been obtained.All these iron compounds have been characterized by IR and 31P NMR spectroscopy.
