Solution thermochemical study of ligand substitution reactions of hybrid alkyl/fluoroalkoxy phosphorus ligands in the L2Fe(CO)(3) system

C M Haar, Steven Patrick Nolan

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The enthalpies of reaction of (BDA)Fe(CO), BDA = (C6H5CH=CHC(O)CH3 benzylideneacetone) with a series of novel fluorinated phosphine ligands, PR,OR, (R = Ph, Pr-1, Cy; R-r = (CH2)(2)(CF2)(5)CF3) and (R1O)(2)PCH2CH2P(ORf)(2) (dOR(f)pe), leading to the formation of L2Fe(CO)(3) complexes (L=PR2ORf) have been measured by solution calorimetry in THF at 50 degrees C. Remarkably, reaction enthalpies are essentially invariant over this series of ligands, despite the differing steric and electronic properties of the phosphorus ligands. Carbonyl stretching frequencies help in the estimation of useful electronic parameters associated with the novel phosphorus ligand series. (C) 1999 Elsevier Science S.A. All rights reserved.

Original languageEnglish
Pages (from-to)32-38
Number of pages7
JournalInorganica Chimica Acta
Volume291
Issue number1-2
Publication statusPublished - Aug 1999

Keywords

  • thermochemistry
  • iron complexes
  • carbonyl complexes
  • fluoroalkoxy P-ligand complexes
  • TERTIARY PHOSPHINE-LIGANDS
  • SUPERCRITICAL CARBON-DIOXIDE
  • TRANSITION-METAL HYDROGEN
  • QUANTITATIVE-ANALYSIS
  • EFFECTS QALE
  • HOMOGENEOUS CATALYSIS
  • ORGANORUTHENIUM THERMOCHEMISTRY
  • ORGANOMETALLIC COMPLEXES
  • L(2)FE(CO)(3) SYSTEM
  • OXIDATIVE ADDITIONS

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