38720-23-9Relevant academic research and scientific papers
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.
Cyclodimerization of Benzylidenacetophenone and Its Derivatives by Use Of Triiron Dodecacarbonyl
Ueda, Tatsuo,Otsuji, Yoshio
, p. 1631 - 1634 (2007/10/02)
The reaction of benzylideneacetophenone and its derivatives with Fe(CO)12 in refluxing toluene gives 1-aroyl-2,4,5-triarylcyclopentene derivatives via (η4-enone)tricarbonyliron complexes.The mechanistic feature of this reaction is presented.
