Syntheses and reactions of iron(II) complexes containing diphosphine ligands with pendant nitrogen bases

George M. Jacobsen, R. K. Shoemaker, M. Rakowski Dubois, Daniel L DuBois

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A series of new iron(II)-hydride complexes that contain diphosphine ligands with pendant amine bases of the formula cs-[HFeL(PNP)2]+, where PNP = Et2PCH2NMeCH2PEt2 and L = CH3CN (3), CO (4), P(OEt)3 (5), have been synthesized and characterized. Protonations of the pendant bases in the PNP complexes have been characterized, and for selected complexes, pKa values have been determined. The acidity of the PNHP ligand depends significantly on the electronic properties of the Fe center to which it is bound, ranging from 2]+ and trans-[HFe(CH3CN)(PNP)(dmpm)]+ (where dmpm is bis(dimethylphosphino)methane), the new hydride complexes reported here do not show rapid intramolecular exchange between the protonated base of the diphosphine and the hydride ligand. This is attributed to steric interactions between ethyl substituents on the PNP ligands.

Original languageEnglish
Pages (from-to)4964-4971
Number of pages8
JournalOrganometallics
Volume26
Issue number20
DOIs
Publication statusPublished - Sep 24 2007

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Nitrogen
Iron
Hydrides
Ligands
hydrides
iron
nitrogen
ligands
synthesis
Protonation
Methane
Carbon Monoxide
Acidity
acidity
Electronic properties
Amines
amines
methane
electronics
interactions

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Organic Chemistry

Cite this

Syntheses and reactions of iron(II) complexes containing diphosphine ligands with pendant nitrogen bases. / Jacobsen, George M.; Shoemaker, R. K.; Rakowski Dubois, M.; DuBois, Daniel L.

In: Organometallics, Vol. 26, No. 20, 24.09.2007, p. 4964-4971.

Research output: Contribution to journalArticle

Jacobsen, George M. ; Shoemaker, R. K. ; Rakowski Dubois, M. ; DuBois, Daniel L. / Syntheses and reactions of iron(II) complexes containing diphosphine ligands with pendant nitrogen bases. In: Organometallics. 2007 ; Vol. 26, No. 20. pp. 4964-4971.
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