Bis(diisopropylphosphino)pyridine iron dicarbonyl, dihydride, and silyl hydride complexes

Ryan J. Trovitch, Emil Lobkovsky, Paul J. Chirik

Research output: Contribution to journalArticle

127 Citations (Scopus)

Abstract

Treatment of the bis(diisopropylphosphino)pyridine iron dichloride, ( iPrPNP)FeCl2 (iPrPNP = 2,6-(iPr 2PCH2)2(C5H3N)), with 2 equiv of NaBEt3H under an atmosphere of dinitrogen furnished the diamagnetic iron(II) dihydride dinitrogen complex, (iPrPNP)FeH 2(N2). Addition of 1 equiv of PhSiH3 to ( iPrPNP)FeH2(N2) resulted in exclusive substitution of the hydride trans to the pyridine to yield the silyl hydride dinitrogen compound, (iPrPNP)FeH(SiH2Ph)N2, which has been characterized by X-ray diffraction. The solid-state structure established a distorted octahedral geometry where the hydride ligand distorts toward the iron silyl. Both (iPrPNP)FeH2(N2) and (iPrPNP)FeH(SiH2Ph)N2 form η2-dihydrogen complexes upon exposure to H2. The iron hydrides and the η2-H2 ligands are in rapid exchange in solution, consistent with the previously reported "cis" effect, arising from a dipole/induced dipole interaction between the two ligands. Taken together, the spectroscopic, structural, and reactivity studies highlight the relative electron-donating ability of this pincer ligand as compared to the redox-active aryl-substituted bis(imino)pyridines.

Original languageEnglish
Pages (from-to)7252-7260
Number of pages9
JournalInorganic Chemistry
Volume45
Issue number18
DOIs
Publication statusPublished - Sep 4 2006

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Fingerprint Dive into the research topics of 'Bis(diisopropylphosphino)pyridine iron dicarbonyl, dihydride, and silyl hydride complexes'. Together they form a unique fingerprint.

  • Cite this