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

doi:10.1016/j.ica.2005.11.039

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

Weizmann Institute of Science

Research output: Contribution to journal › Article › peer-review

76 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 language	English
Pages (from-to)	1955-1960
Number of pages	6
Journal	Inorganica Chimica Acta
Volume	359
Issue number	6
DOIs	https://doi.org/10.1016/j.ica.2005.11.039
State	Published - 10 Apr 2006
Externally published	Yes

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.

Funders	Funder 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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10.1016/j.ica.2005.11.039

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

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.",

keywords = "Iron complexes, Magnetic properties, PNN ligand, PNP ligand, Paramagnetic, X-ray crystal structures",

author = "Jing Zhang and Mark Gandelman and Dominik Herrman and Gregory Leitus and Shimon, {Linda J.W.} and Yehoshoa Ben-David and David Milstein",

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. ",

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T1 - Iron(II) complexes based on electron-rich, bulky PNN- and PNP-type ligands

AU - Zhang, Jing

AU - Gandelman, Mark

AU - Herrman, Dominik

AU - Leitus, Gregory

AU - Shimon, Linda J.W.

AU - Ben-David, Yehoshoa

AU - Milstein, David

N1 - 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.

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N2 - 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.

AB - 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.

KW - Iron complexes

KW - Magnetic properties

KW - PNN ligand

KW - PNP ligand

KW - Paramagnetic

KW - X-ray crystal structures

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

Abstract

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Keywords

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