21044-40-6Relevant 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.
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
