Iron(II) complexes based on electron-rich, bulky PNN- and PNP-type ligands

Jing Zhang, Mark Gandelman, Dominik Herrman, Gregory Leitus, Linda J.W. Shimon, Yehoshoa Ben-David, David Milstein

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75 Scopus citations

Abstract

Reaction of the PNN ligand ((2-(di-tert-butylphosphinomethyl)-6- diethylaminomethyl)pyridine) with 1 equiv. of anhydrous FeCl2 in THF results in the formation of (PNN)FeCl2 (1). The cationic complex [(PNN)Fe(THF)Cl](PF6) (2) was obtained by chloride abstraction from 1 with 1 equiv. of TlPF6. Similarly, the PNP-type complexes 3 and 4 were obtained from FeCl2 with 1 equiv. of t-Bu-PNP (2,6-bis(di-tert-butylphosphinomethyl)pyridine) and i-Pr-PNP (2,6-bis(di-iso-propylphosphinomethyl)pyridine), respectively. Complexes 1 and 3 were characterized by X-ray diffraction and elemental analyses. In both structures the Fe(II) centers exhibit a distorted square pyramidal geometry comprising two chloride ligands and one tridentate PNN or PNP ligand. The magnetic properties of the paramagnetic complexes 1-4 are discussed.

Original languageEnglish
Pages (from-to)1955-1960
Number of pages6
JournalInorganica Chimica Acta
Volume359
Issue number6
DOIs
StatePublished - 10 Apr 2006
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the Israel Science Foundation, Jerusalem, Israel, and by the Helen and Martin Kimmel Center for Molecular Design. J. Zhang is the recipient of the Aron Zandman Postdoctoral Fellowship in Organic Chemistry. D. Milstein is the Israel Matz Professor of Organic Chemistry.

Funding

This work was supported by the Israel Science Foundation, Jerusalem, Israel, and by the Helen and Martin Kimmel Center for Molecular Design. J. Zhang is the recipient of the Aron Zandman Postdoctoral Fellowship in Organic Chemistry. D. Milstein is the Israel Matz Professor of Organic Chemistry.

FundersFunder number
Helen and Martin Kimmel Center for Molecular Design
Israel Science Foundation

    Keywords

    • Iron complexes
    • Magnetic properties
    • PNN ligand
    • PNP ligand
    • Paramagnetic
    • X-ray crystal structures

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